I agree with Quilting Grannie. I have a mid arm and do a little work for customers. I know a tension issue can slip up on you and don't realize it, but when you do, you take it out and do it over, before you let the customer have the quilt back. This gal doesn't seem to care if her tension is bad or learning how to correct it. I'd tell her that you will not be using her again and that she may not receive the kind of advertizing she wants because of the way your quilts were returned and her unwillingness to make things right. You gave her a chance to make it right, on 4 quilts, and she chose not too. I'd find someone else who cares about her/his work and the customers they are working for. So sorry this happened.