If that person IS the ONLY (I find that questionable,it's probably an excuse) longer-arm quilter then the work should show a more professional finish. I agree with the person who asked you to get back in touch with this quilter & demand that the shoddy work be fixed. As you have this forum to tell about your woes, then maybe you may have to remind your quilter that you will not recommend them AT ALL & that if they belong to a "professional" guild of long-arm quilters in your area ( you must have been given their name & address from some-one to find them in the first place) that you will complain to them.
Too much work is not an excuse for shoddy work. You pay for a professional finish, not for the shoddy work you recieved. mbp