Let me refer you to the terms of use you said "I agree" to every time a new patch came out.
RIOT GAMES RESERVES THE RIGHT TO SUSPEND, TERMINATE, MODIFY OR DELETE YOUR ACCOUNT AT ANY TIME FOR ANY REASON OR NO REASON, WITH OR WITHOUT NOTICE TO YOU, AND WITH NO LIABILITY OF ANY KIND TO YOU....For purposes of explanation and not limitation, most Account suspensions, terminations and/or deletions are the result of violation of this Agreement, the EULA, the Privacy Policy, or the Summoner’s Code (defined below). Accounts terminated by Riot Games shall not be reinstated under any conditions whatsoever.
and
While using any of the Properties, you agree to comply with all applicable laws, rules and regulations. You also agree to comply with certain additional rules that govern your use of the Properties (the "Code of Conduct"). The Code of Conduct is not meant to be exhaustive, and Riot Games reserves the right to modify this Code of Conduct at any time, as well as take appropriate disciplinary measures including Account termination and deletion to protect the integrity and spirit of the Properties, regardless of whether a specific behavior is listed here as prohibited. In addition to this Code of Conduct, please see the Summoner’s Code for additional guidance on exemplary game-play behavior. The following are examples of behavior that warrant disciplinary measures:
Item E under than list states that you can be banned for:
Transmitting or communicating any content which, in the sole and exclusive discretion of Riot Games, is deemed offensive, including, but not limited to, language that is unlawful, harmful, threatening, abusive, harassing, defamatory, vulgar, obscene, sexually explicit, or racially, ethnically, or otherwise objectionable;
Furthermore,
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.
and
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.
and
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.
TL;DR You agreed to these terms of use when you played the game. I figured since you are an "adult" you would read the terms of a contract before you paid money on said contract. Riot is 100% right on this and you are 100% wrong. Next time you want to be an ass to others I suggest you read the fine print.
P.S. It took me about 5 minutes to look all this up. If you did the same maybe you wouldn't have lost that $200.