Skins

So I get back from a ban and have everthing just as how I left it. I even played some of the champions that i had the skins for. But i was playing Anivia today and noticed that my birb of prey Anivia was missing. I decided to look more and noticed Battle Bunny Riven was also missing, I was wondering what happened. It is also strange that they were gifted to me from the same person. If you can help I would greatly apreciate it.