Honestly the only thing that anyone in this world right now could do is to put scam accusation on the casino you doubt. If there are any proof that you could share, just starting a scam accusation thread on bitcointalk will allow you to let everyone know about the place and that's it. Fraud is not something that bitcointalk really takes care of, it is not our duty to do something about it.

What you can achieve here is to get their name heard as scam if they are really scam and you have proof, but that's it. There is not like some lawyer or some court here that can do anything about the casino, we have to let it be and only avoid gambling there as our only action.