I agree with what has been posted already.
If she hasn't made an attempt to correct the problem for you, or even answer your emails, then she is not a respectable business person. Go ahead and tell the 200 people you know.
As for fixing it. It depends on how big it is. If it is tiny you may be able to sew it together so that the stitches are inside the quilt. If not, try taking that area apart and placing a piece of same fabric underneath. Bond some fusible web to the RIGHT side of that piece before putting it under the rip. Then fuse it. It will prevent the ripped edges from fraying and will hold the edges down so they don't catch on things. Then redo the quilting in that spot on your own machine. Finish off with binding. That would be my best solution.