@rdgur OK, I just had a quick look on their forums. There's a whole thread with people who ask about how to delete, and admins have responded that you need to PM one of them about it. Only admins are able to delete accounts, which I suppose makes sense as they don't want someone with a bad history simply deleting and returning with a clean slate.
Since you say you're having trouble accessing the forums there I'm happy to act as a go-between to help get your forum access back, after which you should be able to discuss your situation with the powers-that-be. Feel free to PM me with your username and details of the problem and I can pass it on.