Extended Warranty Not Covering Parts Cost

On a recent camping trip my Class A had a couple of issues that needed repair. Leveling Jacks, Slide Motor, HVAC and Refrigerator. I thought to myself thank goodness I purchased that extended warranty! Well the nightmare then began. When I got home I called the claims department and they began the claim and gave me some places that work under them. Unfortunately in Miami there was only one shop and a mobile that wouldn't take my call. After waiting a month and half to get an appointment with said shop I took it in. 3 Weeks later I get the quote of what the repairs would cost. After reviewing the quote I had to pay thousands out of pocket because 1. They didnt cover the hourly rate the shop has and 2. they said the prices of the parts were excessive so they would not cover them leaving me with an almost 4K bill. I understand them not covering the full rate to a degree if its capped but why not the parts. Im stuck between a rock and a hard spot. This is the only game in town without me having to drive the coach over an hour away to have it repaired with no guarantee Good Sams would cover it there. Whats the purpose of insurance if they dont cover the full cost of parts? Needless to say the claims adjuster told me to reach out to Good Sams to argue the point which I did but has yet to resolve anything. Why have a paid for an extended warranty year after year for 4 years if when i need it they dont want to cover the price of the parts..... Extremely frustrated as i lost the entire summer of travel trying to deal with this situation. Everyone has their money from the insurance company to good sams and Im left high and dry.

Suggestions appreciated....:h