Any advice dealing with Nissan corporate?

Speedy10

I have an 09 370 that has been sitting at the dealership for over 2 months. I have no complaints about the dealership. They have taken care of me the best they can.
Ok, so here is my issue. The entire wire harness in the engine compatment needs to be replaced. Seems some critters decided to have wire for dinner.
Dealership orders part, 1 week goes by, they don't hear any ETA on part. Fast forward 2 months, no ETA on part. So, after many discussions with dealer we decide to call consumer affairs. They take all info and open another file. One is already open for the dealership.
I am beyond pissed as the two I have talked to at comsummer affairs say there is nothing the can do and will call me in a few days. I am trying to go above their heads to someone who can tell me WTF is going on. All i want is the Damn car fixed, but as time goes by i am finding myself not even wanting this car back.
Anyone have any ideas as to who I can talk to to get my F*(%^$G car fixed??