I have had similiar experiences with some Long Arm pros. I had one hold three quilts "hostage" missing the scheduled delivery by almost 4 weeks. Each quilt had the completion date clearly stated on the "work order/contract". It was enourmously stressful since all were gifts , and every day I wondered if I would have them back in time to bind. It is a professionals responsibility to complete work as promised or commited.
I understand that "stuff" happens , but you should have been notified that she would not be able to complete on schedule. Understanding you may love her work and the price is right , but if you continue to use her services , you can expect similiar service in the future. I would start exploring other options. Let your wallet be your voice.