I had a Zodiac that the floor became detached from the tubes.
I was able to reglue with a 2 part vinyl glue made by 3M that unfortunately is no longer available. You should be able to find a 2 part inflatable
glue for PVC and fix it yourself.
Nice thing about the 3M glue was that it was in small tubes, because the bottom didn't go out all at once. Every couple of months, I had a new leak to fix. So I kept a few glue kits on board.