I won a round, but got a different amount credited on my account?

If it is a small difference, contact the customer support in order to check the issue or take a careful look at the game transaction history, maybe you missed something. If it’s about larger amounts, you should also be sure to check the terms and conditions. Many casinos have rules like maximum monthly withdrawal amounts or disputed winnings negations in certain cases. The latter is being done in offline casinos, so the online ones may do it as well.