I got scammed by Rito!

So here i was today, looking what i should spend my last RP on, when i decided to buy Pool Party Graves (Amethyst) Chroma. So i bought it, and wanted to check it out. When i joined a lobby, i locked in Graves and searched for the Pool party skin. When i selected the skin, the chroma version was still locked. I tried to restart the game, but it didn't help. So basically Riot just stole my precious RP.:(