I agree with all of the other posters, but to be fair, there are tension issues and there are REALLY bad tension issues. For example are you just seeing tiny little peeks of the top thread color in the bottom? Sometimes no amount of tweaking will solve that problem entirely and the only resolution is to load the same weight thread in top and bottom. But even with this kind of tension issue, you are a paying customer and she should have contacted you about it and asked how you want to resolve the issue rather then continuing on. However if you are seeing eyelashing or, even worse, birds nests and loops then that is totally unacceptable. I would prefer to see pictures before condeming the LAer. Regardless, YOU are dissatisfied with the workmanship. There is no reason to continue to use her. You should find another longarmer and maybe save this quilt or close up photos of the problem as an example to show the new LAer of what is unacceptable to you.