This is one of the best threads I have read in a long time! I have bee quilting for over 30 years, and long arming for 3 years. I have seen many, many quilts in my day....Gone to lots of quilt shows and admired beautiful work. I have never ever checked out someone's quilt to make sure the backing is straight! Some ladies bring me quilts that have 5 seams in their backing fabric, I do the best I can and they keep coming back.
Please don't pay someone to unquilt her quilt, you have done more than enough! I believe that you are a very caring and conscientious quilter....and there are some people that cannot be pleased. It is done, she got her money back, end of story. Did you ever notice that there are people who leave a trail of negativity behind them? After a while you notice that they have less and less of an audience because they are not very credible. Go on to your next customer and enjoy all the warm fuzzies they give you!
Sometimes I think we should have a bulletin board of nice comments our customers have given us, because one like that can sure pull you down.
You did your best Sandra, close the door on it, open a new window and breath some fresh air!