I am so sorry to hear about your problems. I got a kit once from Homestead Hearth that had been gathered as a BOM. There was only one tiny error and it was fixed in the subsequent month. With the hundreds of pieces and parts to this kit, I was amazed at how well the kits were set up. Every single piece of fabric, no matter how small, had a label with all the info on it. I had zero problems with the complex Lori Smith pattern also.
I have also gotten fantastic service from the Fat Quarter Shop and their designer BOM. I bought a BOM kit several years later, from a quilter who never started it, and it was missing a pattern. They sent me a PDF of the pattern within 48 hours of my email. Great service and nice people. Plus I love the fabric.
I would also suspect that Stitchin Heaven would have good service since they run a huge BOM program.