If you really want to stir things up...
Try contacting any TV stations in the area of that RV dealership and seeing if they have any reporters that broadcast dispute resolutions.
Just because you don't live there, doesn't mean they wouldn't be interested in your story.
I'll bet that a lot of "cases" get resolved without broadcasting.
RV sales spike up in the Spring, if they have any brains at all, that dealership will not want any negative publicity.
To get the idea of what I'm saying here's the web link to my local TV station "
3 On your Side".
Lastly, if you have a contract violation, there is always small claims court.
Most of those judges just love to see a contract violation, the case is usually over in a few minutes.
However, that could be difficult with you living so far away.