My skins are gone

While I was allowed to mystery gift myself, I did, and I received Bilgewater Katarina, Jurassic Cho'gath, and Firefang Warwick. Everything was fine and I didn't really play those champs for a while until today, when I realized that those three skins are GONE. I used Riot points that I got from an RP card or that I purchased right off of the client (I can't remember). The point is, I payed for those three skins with Riot points that I got legitimately, and I spent my money on those Riot points. Now, those skins are gone. Rito, pls give me my skins back.