If you told the dealer exactly the model and year of your trailer and they ordered the wrong door - it is theirs! No way you should have to pay for their mistake. If they give you a hard time, contact Jayco yourself - and let the dealer know you are going to do so!
2015 Jay Flight 32RLDS Elite
2012 Chevy 2500HD Crew Cab LTZ (6.6L Duramax/Allison)
Equalizer Hitch (1200# bars)