Wow that's pretty harsh.
Sadly, the only thing you can do is report and black list him. The GMs take this kind of thing seriously, so they probably are really investigating it and will take action once they come to a conclusion.
Whatever you do, don't start talking back to him, don't insult him, he can use that against you. Also you should remove the name from the pictures, naming and shaming is a bannable offense and you don't want to get banned over a guy like this, right?
Sorry I couldn't give you more advice
But stay strong, don't give in to that kind of behaviour. I hope the GMs manage to sort this out for you soon.