I think the shop really should have included explanations with the photos, so you knew exactly what they were thinking. It may be that talking to them now won't help, as it won't be fresh in their minds and they don't have the photos in front of them. You can't really reassure your customer, since you didn't get an explanation of what they thought had to be addressed to keep the quilt from falling apart (that sounds as though it might be an exaggeration). Sorry you're in such a tough situation!