You can buy replacement hinges. Mine had the same problem. Think when I looked they were about £27.
As my van is old and I didn't want to spend that and I wanted to keep my 4 year old out of the frozen lolly stash I fitted a little lock, same as you have on a bathroom door to the cover. Cost 99p and prevent her opening the door.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets