Reading between the lines it sounds like you ran into the common problem we all have experienced with dealership service departments.
They freqently don't want questions, comments, suggestions, and certainly not supervision from their customers. I don't blame them for not wanting to waste valuable time with uninformed owners but they hide behind the service writer and shop door to avoid having us figure out that they are poorly trained, poorly equipped, and trying to take shortcuts to tally up flat rate hours.
The situation is additionally complicated by the fact that "STAR" is making the decisions about what parts can be used and what procedures will be authorized. "STAR" may only be a 20-something just out of college sitting in a cubicle with a phone and computer and no real world experience beyond television sets, ipods, boom boxes, and video games.
I may very well be facing the same challenge you are a few months from now. Does your state have an effective lemon law?
Harvey