You are not the first I have heard having problems with camping world. I just don't understand the RV dealers. Once they sell you an RV they act like they have never seen you and try to rip you off. I would think the manufacturers would get involved to help improve the service and image.
We live in Orlando and have had bad experiences with 2 different dealers neither of which was Camping World so it seems to be universal. Sell it and then try to rip off the buyer. Some days I almost wish I had never bought an RV.