if I were you I'd move on more reliable one.
If it's http://www.existhosting.com/, have you tried calling the toll free number on their website? It's always nice to be able to scream at a human, instead of at a computer. If you do call, remember to record the conversation =)
I would suggest that in future, you get someone reliable like the planet or something =D
Good luck in getting back your money! I really hope you win this dispute!