The door has come off. The door has come off my fridge because the plastic part, holding the metal

Question

The door has come off my fridge because the plastic part, holding the metal thing in place, is broken. I don't know the proper word for it but the metal thing acts like a pivot for the opening and closing of the door. The fridge is model ZI 3165 type B 500600 X No 861120012. Are replacement metal and plastic components available and could a layperson fix the door if given them?