Your post doesn't mention date of purchase or in what state.
Some states impose implied (unwritten) warranties on purchased goods for a period of time. When I sold RVs in my early retirement years, many of our used RVs were sold "as is". But, per NY law, there was an implied warranty for the first 30 days. Some states do not allow products to be sold "as is".
I would suggest you contact the local Chamber of Commerce or an attorney for your applicable state laws. What I would not do is take no for an answer at this time. Best of luck getting your issue resolved.
2015 Shamrock 231KSS, Oyster shell
2016 Chev Silverado LT Z71 Ext. Cab, 4x4, 5.3L V/8
Reese Straight Line WDH, 2000W Honda Gen.
2 Old Town kayaks & 2 Boston Terriers - Zoey/Gonzo
Lar & Ruth
55 nights camping in 2015, 45 in 2016