Poked a hole in the wall of my refrigerator. Is it toast?

If it's not the hole (in the side, not the back), then why will it not get cold? I defrosted it because it was struggling to stay in the mid-low 40's, now it's almost 60 in there and I'm about to go up to the ice machine down the street and fill up a few coolers.

There is a thermister thing on one of the fins and I'm playing with that to see if that would help but it only continually gets warmer. I've tried propane over electric and nothing helps. Food is too expensive these days to lose a whole freezer full of meat.