What kind of dealer would let that thing off their lot in that condition? Did you have any PDI at all? I have called Jayco CS at least three time, and they were very helpful, even though two of my problems were not related to warranty work. But one was, a line to the brakes was rubbing until brakes were not getting electrical connection. I had it fixed locally and then called Jayco. They sent a check for my unauthorized repair. So be polite as ALJO advised and I'll bet they'll get on the dealership for you.
Stories like this one, not typical but too many anyway, are one of the reasons we're not hot to buy a new trailer. Our closest dealer is about a hundred miles away, so not convenient for running back and forth to fix things I can't, which would be most of them.
'11 Eagle 320RLDS
'02 F350 PSD Dually 4WD
DW's Ride, '13 Expedition