Reporting a buyer, anything else I can do?

Hello.

I have a buyer recently that is causing some issues. They are not returning the product but getting a refund. Amazon charge fees every time a customer is refunded as a some sort of service fee, so their abuse is costing us money. I don’t think people realise what actual costs happen when they just return an item or in my case, don’t return the item. This problem with the buyer has happened twice now, you are not able to simply block the buyer like you can on other platforms beginning with E.

Seller support suggest to report the buyer under violation which we have done, but it says that the case will only be logged and we are unable to hear the outcome due to policies.

Can anything else be done about the buyer? or do we have to cope with these type of customer and move on…?