I assume you have already paid her in full
I don't think she did it on purpose, however, she is a professional and should stand behind her work. She needs to pay for the shipping to get it back to her to finish the job. When she receives it, your quilt should go to the top of the list and be completed quickly. If she knows someone locally that could complete here work then she should pay for the additional work that she didn't complete. So easy for us to say, as we're not the ones that have to do the confronting. Wishing you well