A bet that did not count
Note the bet ID from the slip history in the app and send it to support with a screenshot of the result.
An Advancebet deduction
If an Advancebet deduction looks wrong after your original bets settle, ask support for a transaction statement.
Escalation
After support, the Anjouan licensing body.
A screenshot
Capture the error in the app and send it with your account number, the bet ID and the app version.
Escalation
After the support channels, the Anjouan licensing body is a higher level.