Oh, I definately think you have reason to be..... ummm.... peeved in the extreme. I can't even imagine that they would not finish to look as wonderful as when you started it. I would have said more than a few choice words to them, but you probably handled it better than I would have.
It's amazing to me that some quilters can be so helpful and wonderful and others so disturbingly disgusting. How irritating.
I am very sorry that they did that to you. I love the look of the quilt otherwise. You must have put a lot of work into it. Also, I love the Christmas fabrics, and the dark blue to balance them. You did a great job.