Why would you do that? They don't have to provide you shit. They can ban you at any time, for any reason and they don't even have to inform you that you've been banned. Any communications to you after a banning is just a courtesy. They don't have to extend you any type of courtesy at all.
I think as WoD is not released yet there should be a really realistic chance to get the money back because they did not provide any service for the money yet. After the launch of WoD this would be a different case but until now I think that he must get his money back