Replacement of a/c on pop-up camper

We took our pop-up camper to Jerrys Camper in Lennox SD to have the a/c replaced. They quoted us a price in the $800 range but it ended up being $1065. We didn't open the camper until we got to the campground the day we picked up our pop-up. Upon looking at the ceiling of the camper, we noticed that they literally tried to put a square piece into a half-moon opening and the cord was hanging and was not even attached to the ceiling. My husband fixed it very easily. I sent a letter to Jerry, the owner, with pictures of what was not acceptable and told him we would not be bringing our camper back to them for any service. He called me and said they could fix it. I told him my husband had already fixed it and he said they wanted to make it right because they wanted us to come back. He told me he would have Brian call me. it is now a month or more later and I have yet to hear from Brian.