It appears that upon examination, your account was in violation of the casino's shared environment policy:
8.11.7 We reserve the right to restrict players in any way we see fit, at our sole discretion, from opening accounts at the Casino in situations where computers or environments are shared.
Due to the nature of this issue, we cannot publicly reveal precisely how the casino determined that the environment was shared, as this information could be used by players who intend to defraud the casino. But I can assure you that there were several common factors between your account and other accounts at the casino to justify the closure of your account.
The following terms & conditions apply here as well:
6.3 If we de-register, exclude or suspend you from a Casino, we shall have the unlimited right to:
6.3.1 withhold payment to you of any contested funds, whether such funds are deposits, refunds, bonuses, free monies, Casino credits, payouts or the like;
I hope this clarifies matters.
All the best,