Hi cent - You start the conversation with "Mary, I am SO Unhappy
with the way you did this quilt." and then if she says something dumb like
"what's wrong with it" you will have reason to get your dander up and tell her what's wrong with it and what you'd like her to do about it.
Your quilt is unusable as it is - so you have nothing to lose.
Please don't let someone get away with this behavior. The next person
certainly won't.