Not good on the damage, but I think you are probably on your own about this--just too much age involved. They also won't be sympathetic about your personal situation, either--just not in their DNA.
Depending on your expected use in the future, and how much you care how it looks, duct tape was wrong item. Look up Eternabond on internet and read about it--proper use of it should keep it from leaking further and it does look better than duct tape if applied properly.
And, welcome to the forum.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired