If you are unsatisfied with the Premium Features of Malwarebytes for Android, you can request a refund of your purchase. However, since these transactions are done through Google Play, there is a specific way to request a refund. When you send us report a problem, the important information we need to locate your transaction is automatically populated in the email generated from your device. The article below will have information on how to report a problem using your device.
As a comment at the beginning of the request, indicate that the reason for the request is for a refund.