At the very least I would return the quilt and say all the things wrong with it which need to be put right in order for it to be quilted properly. Tell her it will not quilt up like it is that way! Tell her your reputation as a quilter is at stake! Not only that, if I was in your place I would feel totally used, and I am sure that none of my friends would treat me that way in the first place! In the future I would decline any further collaboration quilt making sessions with her as I feel she has taken you for a ride.
Best of luck with everything
Gal