Banned for what

[Ragga]

Hello can i ask why char name Valantain human mage is banned for what reason?i stopped to play wow at all from 2 years now i've been playin in the server from 2015. my queston is why im banned like i didn't even played when that happend i just came back try to log and my acc is banned ? i can't even find my char name is Valantain i also got other char's cant find them in site or in game when i try to add them in friend list ..