Hey, that's a pretty serious accusation. If it was true, it could be quite a problem. Alternatively, if the casino is licensed, you might report it there and you will see what they say. Of course, I don't know what kind of casino it is yet. That would probably be my step to start with. 

Anyway, did you lose money in the casino as a result of all this or did you just notice it and make a record of it?