Auto shop business practices

A shop in NJ charged my sister for a 4 wheel brake job on her old Duster she had. Car had drums on it. She thought it was a bit odd when they charged her for new rotors & calipers. She crawled under the car when she got it home and not a damn thing had been replaced. They were the only shop in her community at the time. Did not take long for them to go under afterwards....