NHTSA Complaint #11664482 — 2017 CHEVROLET IMPALA

I've only had my car for about 2 1/2 months, when I started to notice my car moving to the right without me moving it. I figured it needed a front-end alignment. So, I took it to a mechanic. Once he got it up on the stand, he noticed something wrong with the front suspension. He didn't do the alignment, but he told me that my "Rack and pinion" was going out. I then made and appointment with the dealership. They looked at it and told me it was my steering and that it wasn't cover under my warranty and that the part to fix it was "Nowhere in the country to be found", and if I brought the part to them. They wouldn't put it on. So now I have a car note and insurance bill on a car that I'm afraid to drive. What are people supposed to do about these cars? It would seem that It's not just a me problem.