And so likely, I haven't heard that there's a legal jurisdiction in existence to back gamblers up against casinos oppressions.
Even in the highily regulated regions, I've always heard about the casinos cheating players but the players have always stand defenseless. Very weird and not even the government that cares about you and yet the casinos reputations are under their watch.
So it's just better you save your resources of facing a fight with the casino otherwise, your efforts will be in vein.
Maybe if the casino is licensed in your country, it would be much easier to take legal action against them. However, most online casinos these days only hold a Curacao license and operate offshore, making it nearly impossible to hold them accountable legally. In such cases, your best option might be to expose their scam publicly and see how the community responds.