The hinges need replacing, the guides may also need replacing.
You need to remove the door by opening it, locking the hinges by turning the metal discs on the door, then lifting the door off. It's a bit fiddly but it does lift out.
You can now take the screws out of the top of the door (or wherever they've been hidden on your model) and split the door. Replace the hinges, rebuild the door, refit and it should now close properly.
If it's still giving some bother the guides will have to be replaced and this is a strip down of the oven to get to them.