I notice Bryan mentions at least one complaint from Joyland in his current newsletter:
http://www.casinomeister.com/newsletter.html (you need to scroll down a bit)
On the face of it your case looks like simple theft, but there's not much we can say without knowing the full story and the casino's justification, if they have one. You could try "pitching a bitch" (if you haven't already), but Casinomeister's going on holiday so it'll take a while to get a response.
I've never seen this casino mentioned before & I don't think it's on any blacklists. Is it new and/or a member of a better known group of casinos?