From the above i just wanna say that i dont want any $ that is not mine like legitimate won or anyting and if they have asked for it to be returned i would do it if they said we goona sue u or whatever
I suppose there is no way out of this situation for you except the legal action. If your lawyers serve them papers and get them inside a courtroom, they will be facing a very powerful legal team. If you end up losing, they might ask the judge for you to pay their legal fees. I think this has to be taken in to consideration when you contemplate the next step.
He has some experience in several legal suits against his country and school despite his very young [22 years old] age, so I choose to believe [the italic being an over-exagerrated emphasize] he knows what he's doing and have been assessing the possible outcome of the next action he said he'll take: suing the casino.
Well, this does not seem be ending in a certain victory for the OP. If he has decided this is the course of action he wants to follow and he knows what he is doing then I am sure he will the thread updated.