Ok, so this is completely my fault, but I need to know whether it's repairable or if I have to eat it completely and buy a new fridge... I had ice build up on the inner back wall of the unit. Stupidly, I used a steak knife to knock it all off. I ended up with three punctures and the next am woke up to a leaking, not refrigerated unit. I turned it off and cleaned it up, caucked the holes and turned it back on. Of course, it didn't work. Is the inner back panel replaceable? Worth it? What is this part called? Thanks for any help!