Your quilt is gorgeous and has such beautiful piecing. I would be very disappointed to discover those quilting issues after all the work you put into it. The quilter should have made it right for you and learned from the mistakes. I hope you can fix it to your satisfaction.
PS: I've experienced that heart sink moment also discovering bad quilting results. The only recourse for me was to take the backing off, replace it, and then re-quilt.Best wishes!