I don't have that experience but you can withdraw your money to your own wallet. But I am familiar with the delayed sending of the funds to the exchanges because I routed it through a mixer before the funds arrived at the exchanges.

Casinos have their own regulations in line with the government's regulations. They will obey that because casinos are bonded to the government. They can block or delay the transaction if they find you use mixers or suspicious ways.

It is better to stay away from something that can risk us getting a problem. It is not worth doing so you should search for a safe way for you to withdraw the funds.