Purchase, Body repair

We purchased an RV from American Spirit early in the fall. The vehicle had pock marks, dimples and chipping in the paint in multiple areas. John at American Spirit felt that it was either hail or a kid with a BB gun. He assured us that the damage would be repaired. It is written on our bill of sale. Their crew attempted to fix it, sanding the paint off in multiple locations, and doing some fiberglass work outside in 20 degree weather. At some point, they decided to take the unit elsewhere for repairs. The vehicle was found to have rotten walls under the fiberglass, so much so that the side mirror could not stay securely mounted. The unit was repaired and repainted. It is finally done. Now American Spirit is refusing to pay the repair shop for the repairs. They say they never spoke with anyone at the repair location. Really…You drop an RV off somewhere for repairs, and speak to no one? When it takes 3 months to repair, you never call the repair shop and say"Hey, whats up with that RV I brought you" The repair shop took pictures, they spoke with American Spirit. Long and Short, They are refusing to pay for any of the repairs, saying they never authorized them. I would not trust American Spirit again. A business, nor a man, is only as good as their word.