I had a little problem with my couch last year after a long trip in that a screw in the outer wall of the slide came out and the couch kinda moved a bit into the living area. Was worried about a major repair, but was able to fix it quickly by using a toggle bolt in the wall area to secure the brace for the couch. However, my problem wasn't near as drastic as yours with that hole in the wall. You may end up having to replace some or all of the wall, but if Jayco thinks it might be a misalignment of the slide out wall, it might be a bit more complicated. Sorry to see that.
2012 GMC 2500HD D/A Crewcab
2012 Jayco Eagle SuperLite HT 26.5 RLS
2009 Crestliner Superhawk 1900
2013 Polaris Sportsman 550 EXP
2008 Polaris Sportsman 700 X2