Exactly. My FFL for NFA stuff had an issue with an anti-2A credit card billing company (don't know the name). The company refunded the customers and we had to pay all over again. In some cases it was for work already performed (engraving and cerakote in my case).
As for Paul's excuses... Money leaves a trail and a good investigator will find it. Has anyone tried to file criminal charges and get LE involved?