GE Refrigerator Freezer not freezing and fridge is barely cool

I have a GE Refrigerator Model #GSS25VFPEWW and 2 days ago the freezer stopped freezing and fridge isn’t as cold as it should be my husband pulled the fridge away from the wall and we noticed the sides close to the doors are HOT to the touch and the piece in between the doors is also hot the back bottom was pretty warm too so I put a fan facing into the bottom opening and the freezer was freezing some things within 4 hours everything isn’t completely frozen but it’s definately a lot cooler than it was. What do you think the problem might be and is there anything I can do that might fix it.