For your sake I hope you’re posting from Canada. Since that camper is $50k usd on a good day (for the dealer), brand new. 
Even worse if the dealer and the mfg refused to do some simple repair under warranty. Especially since the dealer pocketed an extra $20k on top of normal profit. 
in general, expect a bunch of quality issues with a new rv. Especially little piddly stuff  like your fridge mount which may not even be worth the time to take it in, since it’s so minor. 
Good news is, after a year or 2 of good use, the little fit and finish stuff should be behind you. 
In the meantime pack a basic tool kit and use it as needed imo.