If a casino makes a deal with a player, they should stick to that deal. In your case it's thousands of dollars or at least could be and 1 would think you could take them to court assuming everything you say is correct. Would you win the case? No clue, but worth a shot if everything you say is legit.

Regarding jurisdiction issues. Is there anything in their affiliate terms that say users from certain countries cannot get referrals and commissions? Might wanna look into that.

Sometimes casinos are in a rush to get players and offer very lucrative affiliate deals to users, issue is they cancel the deal once they have the players. They don't need you anymore. Again, look at the terms of the affiliates. Think about contacting a lawyer. Not saying this casino is or isn't screwing you over, but never know. A lawyer will be able to give you more answers than this forum unless you contact their campaign manager and he/she is willing to talk to the team for you, but likely they will relay 1 message and be done. If the owner wanted to talk to you, they have your info I assume and would talk to you if they were interested. So either go to court or give up.

1 last thing, if you'll notice it's all newbies agreeing with you. Looks fishy. I don't know if it's you on alts or not, but if it is stop. Just present your case and evidence and let the legit members help if they wish. Holydarkness may get involved if you're not rude.