If your friend had a genuine interest in quilting or in learning together with you, I would encourage you to finish it with her. However, it sounds like she is just trying to make a quick buck off of your fabric and time and that is just plain unacceptable. It sounds like her listening ears are broken so I would do as Merry suggested and send her to a long arm quilter. Wash your hands of the problem and be too busy to help her when she wants to do anything quilting related in the future.