I am asking this one for a friend. He is a bit confused ...
My buddy does insurance work. State Farm (for example), hires him to do work for them and he fixes the bathroom of a homeowner. The work was authorized by the insurance. The insurance company thought the work was great, and they paid him. The homeowner thought they should get more, and they have threatened to file a complaint unless he gives them a bunch more (free) work. He has no contract with the homeowner at all. Nothing. The homeowner didn't hire him, and had no say in what was done, but they seem bound and determined to get what they want, even if they have to lie to get it. Can the homeowner file a complaint even if they didn't hire him? The work is good, this just a classic shakedown.
Tim