If the tension is truly off and the bobbin thread is loose, it won't take a lot of effort to rip out the quilting. You most definitely could do it in less time than it took to piece the top if the tension is bad. However you may have some difficulty ripping the areas that were "over and over places more than once". BTW this is called travelling or back tracking and is sometimes the only way a design can be quilted continuously which is the lesser of two evils when compared to locking the stitches and clipping threads to restart. Most quilters try to travel in places it won't be so obvious like over an existing line of stitching and in the ditch.
Before you rip (if this is what you decide to do), take pictures. Detailed closeups of every section you think is subpar and email those pictures to the group. The group may just agree with you and get together to help rip. They may also speak to their volunteer LA or perhaps have another. QOV themselves will match your top up with a volunteer LA quilter, just go to their website and contact them. You will probably have to mail the quilt off. I know that QOV LAers are volunteering their efforts and get no compensation for the quilting just as you get no compensation for making the quilt top and finishing the binding on the quilt. It is an unfortunate fact that this is how many beginning LA quilters learn how to LA, by doing donation work.