I say you either sue them or go to a reporter, twitter, facebook.
If you manage to go to a reporter, they would be more inclined to solve things with you as that would make negative marketing.
I don't think attempting to sue them is going to get you anywhere as you will end up just spending more money in legal fees. Has no one even specified why your IP was banned?
So let me get this straight, you have not tried to withdraw your funds, so they should in essence just be sitting in the funds section when you log into your account right? Also, how do you know that your support tickets are being deleted?