Another seldom used tactic is to call the bank who did the financing. If they do a lot of financing for the selling dealer they may be able to exert pressure to get the repair done pronto. Particularly if you let slip that perhaps you might not be too interested in paying any more for an unusable trailer. They have more leverage than you have. They may even have some leverage with FR is they do the floor planning for the dealership.
Richard & Rosalba Charron
2015 Ford F150 Eco Boost
2016 Coachmen Chaparral Lite 29MKS