I was one of the complainers as I posted a video of them using your nick in game using the hack. With that said I think it later became obvious that someone had hacked your account. I'm quite sure HTC knows this as well just by looking at IP logs. As a webmaster, I have to assume they have the ability to check IP's vs player names.
So assuming they found no connection I think it's kinda lame that they wont give you back you old name.