Wow, the RV industry is just a mess. I would hate to be a Dealer. Really hard to believe that anyone selling a brand new RV to someone at today's prices would be trying to rip them off too. Often times; some buyers feel entitled and expect a me first response and reactions from workers in these service centers.
Surprised I saw no reference of RV Manufacturer or if they were engaged. It is only two years, but I now know all of the Winnebago Class A Customer Service Reps on 1st name basis. They see my number on the Caller ID and I guess they are braced for me too

But they have been nothing but wonderful.
This story while it may have been misguided, is exactly why most dealers do not even wish to bother with working on a RV that they did not sell to. You could get get a holier than thou attitude type customer that burdens your dealership with the focus of everything you don't like about what you decided to purchase. And worse they take it take to social means and put the dealership on blast.
I have been lucky with my Service dealer, I didn't buy from them; but I have used them for things that I wanted to do on my own just to keep a positive relationship beyond mere warranty work. I noticed that they even charge me the preferred labor rate as if I bought from them
FWIW, my RV is at dealership now going on two weeks. I think their storage fees commence 1 week from when they call you to pick up. But I doubt they actually due unless you just go awol and they a legal basis to start the charges.