Welcome to the forum and oh my goodness, I would be crying too. I am planning on popping up mine this weekend and hope I have no issues. Once you talk to the dealer, you will have a better idea of what gives and I hope this can be made right quickly and will not interfere with camping plans.
So, how old is your PUP? Were you able to find how they got in? Is there still a warrenty? What about the mattresses and cushions, are they ok?
For the canvas, you may also want to check with other canvas replacement companies to get other quotes. One is Bear Creek and I think the other is Canvas Replacements. Have not had to use them, but I understand they do a good job.
Tricks people have mentioned to keep critters out over the winter include not dropping the stabilizers and dryer sheets. I have not used dryer sheets, but I do keep the stabs up. I also take just about everything out of the camper like the curtains, cushions, and paper goods.
Let us know how things work with the dealer.
HTT: "EscapeII" 2016 Shamrock 23WS (current)
PUP: "Escape" 2010 Rockwood HW 277 (gone)
TV: "Bruce" 2011 Dodge Durango V8 Hemi Crew
Just us gals (me, Sis and our daughters)
Traveled 19520 miles and 209 nights in 7 years and counting