I run a long arm quilting business and turn all of my quilts around in less than 7 days. If your quilt was on the frame, and then got caught and they have to unpick, wow, that is not great. (It does happen, but IT IS BAD when it does). If that was me, and I had missed the deadline to boot, I simply wouldn't charge the customer. And I would be apologising for the delay. Before paying any money, ask them to show you where it got caught, and then inspect your quilt carefully. There are times when, during the unpicking, fabric can get snipped actidentally. If you find any cuts at all, don't pay a single cent for the quilting. Best of luck. X