Happened in my case too. As it seems, you don't get confirmation mail in this forum when you want to change pw and e-mail, which makes it so much easier for hackers. So, all they have to do is looking into the leaked user database, for people that didn't change their PW's.

Still didn't get help. They just banned my old acc (I demanded this).... at least something. But they could just give me the account back since there proof enough in my thread that it was stolen from me.