platinum protection plan from camping world

We purchased a used 5th wheel Heartland 2011. Been RVrs for years but quit for number of reasons 7 years ago. Decided why sitting around waiting to die..lets do what we love and so started looking. Our brains are no what they were being 80. We bought through Portland Oregon Camping World sales guy named Andy. We purchased extended warrant with it as sales guys said covered everything from hitch to bumper. We were told it was served and all ok.. Headed for Az..and 800 miles down the road blew a tire. Called Good Sam but they could not find us but those in RV park where we were helped us change to what looked like a new spare tire. They said date on the tire was 2010 and since they looked new...as did the RV must have sat on them for years. We got cost infer from tire places and Camping World when got to Buckeye Az. Camping world wanted 300 for tire and all local tire dealers wanted 130 installed. Called Camping world where we bought the tire and said the extended warranty did not cover undercarriage or tires. Did say they would pay for the 130 dollars for the one that blew but no more. We were told by other RVrs and tire places we checked with all of the tires that old could blow. Long story short we cancelled the 2400 4 year extended warranty. We are waiting for our check. Beware when buying used rigs...we were told by manager at camper world they replace if 7 years old.