Took RV to fairly large truck brake shop. They said needed all four rotors and calipers, disks, etc. I said OK and also replace brake lines as they are corroded and one had been fixed in not distant p...
I am thinking you need to call the folks who issue driver's licenses and vehicle registrations in your state.. Good chance they regulate repair facilities as well.
Your situation, epically the non replacement of the brake lines you paid to have replaced, sounds a bit........ like something they should investigate.