Buy a new fridge.
Yeah I know what website I am on, but why put up with a defective product on something you use 20x a day?
A brand new fridge costs maybe $1000, a fancy one $1500. Honestly they are an amazing deal for what you get. They can last for decades, kind of feels like one of those things where dealing with the day to day hassle of a broken one is just silly.
I've gotten used ones as well, so maybe a new to you fridge is in order. But why put up with food falling off the shelf every time you open it. MMM is not about saving the most money, its about finding the most happiness. Dealing with a jacked up fridge would piss me off daily.
But to each their own, good luck in whatever you try.