There are several things you can do but ours is the most sensible option. Most players will vent their non-payment frustrations at public gambling forums.
Don’t do that right away. More often than not they’re to blame. They often forget to read the bonus terms when they played with one.
Or they violated one of the casino’s general terms and conditions. Contact the casino’s manager and ask him why they haven’t paid your winnings or refuse to pay you.
They’ll investigate your account and revert back to you. If the casino still refuses to pay you then read our guide online casino refuses to pay.