If you believe that a game didn't payout winnings or closed suddenly, kindly first try some troubleshooting such as:
Open the game from a different browser
Open the game from a different device
Should this not solve the issue, it is important that before contacting our customer service you have at hand the following information as this will be needed in order to be investigated with the game provider:
Round ID or,
Time of occurrence with a timestamp of maximum 10 minutes
Screenshot of the error you may be getting when opening the game
You may generate a gaming report from your account and locate the round ID from the Transactions Section of your account.