OP,  are you sure that you have not violated their terms? You have not abused their TOS just like what they are telling you?

In any case that you had a violation, I believe that @Coinzino Casino specified which terms have been violated (not necessary to publicly disclose it, but between the 2 parties, it'll be sufficient). On the other hand, if you are not guilty, I hope that you can get back the funds stolen from you.

If I am asked for my opinion regarding these issues of accusing and banning players for breaking the terms of service, it'll be best to provide evidence that the user really did what they accuse him of.