That requires strong proof before authorities investigate this matter, and basically they won't intervene if the accusations has no significant issues. Refund or return of funds is not possible unless their management will accommodate this serious concern. Hopefully this matter will be address properly to avoid possible circumstances.
We can complain about the gambling site, but we do not have strong proof, they will not listen to our complaint, and even the casino will ban our account easily. They can found our mistakes easily and they do not have to do many things to ban the account. It is a small chance if that is related to refund a fund, especially if we are not on the right side. Even if we are on the right side, they will not easily give the money to us, instead, they will block our account and will not let us continue.