The problem with my credit card was resolved, but I am now forbidden to play. Why is that?

A possibility that you have been put in the casino’s black list exists. It results in not letting you do any bets or wagers any more and/or suspension of your account. You may be “blacklisted” in case of past credit card issues, disputed charges (some gamblers will try to do that illegally, claiming that their card was abused), or other online payment method problems. In order to avoid possible future losses, the online venue will often prefer to forbid the player to play with them at all.