The lower hinge's plastic support has broken off completely. The metal hinge has subsequently worn away at the bottom of the fridge door, wearing away and opening up the hole where the hinge was previously inserted. A small amount of welding / metalwork will be required to reinstate the place where a new plastic hinge support would be inserted.
Best to get an on site survey/quotation done, this is a free service to you and you will get 3 quotes. Simply post your job onto rated people's site.
You are not obliged to go with any of the quotes- but ever job that's posted is paid for by the relevant tradesmen.if they contact you that means they are interested in your job. If one of them are awarded the job then great news for you both.
Modern day fridges are constructed from very thin metal, welding may not be possible, and when you consider the gas inside the system is highly explosive, it may require a different approach- or be time to buy a new fridge.
I would suggest buying some liquid metal, I have used this stuff before and it was brilliant.
Hope that helps.