Quilt back from quilter with borders stretched
After piecing a rather involved quilt, I added striped borders with mitered corners to match stripes that ran around the perimeter of the quilt. I took great care to make sure everything was square and matching. I sent it out to a longarm quilter and when it came back to me, the borders had been stretched especially at the corners. I don't know how to remedy the problem. If I leave it as it is and bind it, the binding will obviously not follow the stripes of the outer border. If I try to square them it will cut off the stripes and in places and be obvious in the finished quilt. I've thought about picking out the stitching and cutting the quilt back before the striped borders but am not sure that will solve the problem.
The only other thing I can think of is to let the binding follow the skewed stripes but then it will not be square. Any suggestions ?