You can't recover them. You can find out why by reading section 4 of the ToS that you agreed to every patch.
IV. OWNERSHIP
A. Intellectual Property. All rights and title in and to the Properties, and all content included therein (including, without limitation, user Accounts, computer code, titles, objects, artifacts, characters, character names, locations, location names, stories, story lines, dialog, catch phrases, artwork, graphics, structural or landscape designs, animations, sounds, musical compositions and recordings, Riot Points (defined below), audio-visual effects, character likenesses, and methods of operation) are owned by Riot Games or its licensors. The Properties, and all content therein are protected by United States and other international intellectual property laws. Riot Games and its licensors reserve all rights in connection with the Properties, including, without limitation, the exclusive right to create derivative works therefrom. You agree that you will not create any work of authorship based on the Properties except as expressly permitted by Riot Games. Additionally, except as otherwise set forth in this Section IV.A, Riot Games does not authorize you to make any use whatsoever of any Riot Games trademarks, service marks, trade names, logos, domain names, taglines, and/or trade dress (collectively, the "Riot Games Marks") under any circumstances without a written license agreement. Any reproduction, redistribution, or modification of the Properties, or use of the Properties not in accordance with the EULA or this Agreement, is expressly prohibited by law and may result in severe civil and criminal penalties.
Notwithstanding the above, Riot Games may make a "fan kit" available to you (which may be located on the Site) that includes a limited license to use certain Riot Games Marks and other proprietary material. Except for the license expressly granted with the "fan kit," Riot Games reserves all rights, title, and interest in Riot Games Marks and all other intellectual property, and does not authorize you to display or use such in any manner, including but not limited to use on websites, on blogs, in forums, in signatures, on products, or in printed or electronic publications.
B. Game Assets, Riot Points and Virtual Items. When using the Game, you may accumulate in-Game assets associated with your Account, including, without limitation, objects, artifacts, currency, items, equipment, and/or other value or status indicators (“Game Assets”) that reside on servers operated by Riot Games as data. You acknowledge and agree that such Game Assets are accumulated as part of your Account and therefore you shall have no ownership or other property interest in any of those Game Assets. You further acknowledge and agree that Riot Games has the right, but not the obligation, to delete, alter, move, remove, or transfer any and all Game Assets, in whole or in part, at any time and for any reason, with or without notice to you, and with no liability of any kind to you. Riot Games does not provide or guarantee, and expressly disclaims any value, cash or otherwise, attributed to any data residing on servers operated by Riot Games, including without limitation the Game Assets associated with your Account.
If you have a valid, active Account, you may participate in our Riot Points service offering, which is a redeemable point system that operates like virtual currency (“Riot Points”) used to license certain Game Assets that can be used while playing the Game, including, without limitation, special champions, champion “skins,” and boosts (“Virtual Items”). Riot Points can be purchased online through the in-Game store or at retail in the form of a prepaid Riot Games Game Card. Please note that you must register your Riot Games Game Card in the in-Game store in order to access the Riot Points the card contains. Riot Points might also be provided to you by Riot Games as part of a promotion, or through other means, such as completing certain quests or achievements in the Game, or through Riot Games-sponsored contests or sweepstakes. You agree that you will be solely responsible for paying any applicable taxes related to the acquisition of, use of or access to Riot Points. Riot Points are sold or issued in bundles and the price may vary depending on the amount you purchase and where you are purchasing. As Riot Games feels necessary, in its sole and absolute discretion, Riot Games may limit the total amount of Riot Points that may be purchased at any one time, and/or limit the total Riot Points that may be held in your Account in the aggregate. Riot Games will notify you in the event that you near any such limit. Additionally, price and availability of Riot Points and/or Virtual Items are subject to change without notice.
You are solely responsible for verifying that the proper amount of Riot Points has been added to or deducted from your Account during any given transaction, so please notify Riot Games immediately should you believe that a mistake has been made with respect to your Riot Points balance. Riot Games will investigate your claim, and in doing so, may request some additional information and/or documentation to verify your claim. Riot Games will let you know the results of the investigation, however, you acknowledge and agree that Riot Games has sole and absolute discretion in determining whether or not your claim is valid, and if so, the appropriate remedy.
YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE RIOT POINTS SYSTEM AND THE VIRTUAL ITEMS YOU ACQUIRE HAVE NO MONETARY VALUE AND CANNOT BE REDEEMED FOR CASH. NO REFUNDS WILL BE MADE FOR THE PURCHASE OF RIOT POINTS OR FOR VIRTUAL ITEMS OBTAINED USING RIOT POINTS. Some Virtual Items you obtain may have expiration dates while others do not, and each Virtual Item you obtain using Riot Points will be included in your Account until the earlier of that Virtual Item’s expiration date, or your Account’s expiration or termination date, or such date when Riot Games ceases to offer or support the Game.
The sale or transfer of Virtual Items or Riot Points between users may only be conducted via services approved of and provided by Riot Games, if any, and Riot Games may terminate any Account that acts in contravention of this prohibition.
NOTWITHSTANDING ANYTHING TO THE CONTRARY HEREIN, YOU ACKNOWLEDGE AND AGREE THAT YOU SHALL HAVE NO OWNERSHIP OR OTHER PROPERTY INTEREST IN YOUR ACCOUNT, AND YOU FURTHER ACKNOWLEDGE AND AGREE THAT ALL RIGHTS IN AND TO THE ACCOUNT ARE AND SHALL FOREVER BE OWNED BY AND INURE TO THE BENEFIT OF RIOT GAMES. YOU ACKNOWLEDGE AND AGREE THAT YOU HAVE NO CLAIM, RIGHT, TITLE, OWNERSHIP OR OTHER PROPRIETARY INTEREST IN THE GAME ASSETS, VIRTUAL ITEMS OR RIOT POINTS THAT YOU ACQUIRE, REGARDLESS OF THE CONSIDERATION OFFERED OR PAID IN EXCHANGE FOR RIOT POINTS OR VIRTUAL ITEMS. FURTHERMORE, RIOT GAMES SHALL NOT BE LIABLE IN ANY MANNER FOR THE DESTRUCTION, DELETION, MODIFICATION, IMPAIRMENT, “HACKING,” OR ANY OTHER DAMAGE OR LOSS OF ANY KIND CAUSED TO THE GAME ASSETS, VIRTUAL ITEMS OR RIOT POINTS, INCLUDING BUT NOT LIMITED TO THE DELETION OF GAME ASSETS, VIRTUAL ITEMS OR RIOT POINTS UPON THE TERMINATION OR EXPIRATION OF YOUR ACCOUNT.
C. Unsolicited Idea Submissions. Riot Games values your feedback on its services and products, but please do not submit any creative ideas, suggestions or materials. Neither Riot Games nor any of its employees and/or contractors accept or consider unsolicited ideas, original creative artwork or other works, including, without limitation, ideas or suggestions for new or improved games or technologies, game or product enhancements, marketing plans or names for new games (collectively “Unsolicited Ideas”). Please do not send your Unsolicited Ideas to Riot Games or its employees and/or contractors. This policy is aimed at avoiding potential misunderstandings or disputes when Riot Games’ products or services might seem similar to Unsolicited Ideas that are submitted. If you do submit your Unsolicited Ideas to Riot Games or to any of its employees and/or contractors despite this policy, then you hereby acknowledge and agree that, from the time of transmission or dispatch, you grant Riot Games and its designees a worldwide, perpetual, irrevocable, sublicenseable, transferable, assignable, non-exclusive and royalty-free right and license to use, reproduce, distribute, adapt, modify, translate, create derivative works of, publicly perform, publicly display, digitally perform, make, have made, sell, offer for sale and import your Unsolicited Ideas, including, without limitation, all copyrights, trademarks, trade secrets, patents, industrial rights and all other intellectual and proprietary rights related thereto, in any media now known or hereafter developed, for any purpose whatsoever, commercial or otherwise, including, without limitation, giving the Unsolicited Ideas to others, without any compensation to you. To the extent necessary, you agree that you undertake to execute and deliver any and all documents and perform any and all actions necessary or desirable to ensure that the rights to use the Unsolicited Ideas granted to Riot Games as specified above are valid, effective and enforceable. You also give up any claim that any use by Riot Games and/or its licensees of your Unsolicited Ideas violates any of your rights, including but not limited to moral rights, privacy rights, rights to publicity, proprietary or other rights, and/or rights to credit for the material or ideas set for therein.