Air Bag Light On problems of the 2017 Ford Focus

My 2017 Focus rs (build date 20 March 2017, purchase date 16 June 2017; 30234 miles) had the srs light illuminated on the dashboard. This started as an intermittent issue about a year ago, and progressed to the point that recently the light is always illuminated. Ford provides for a "safety restraint system" warranty period of 5 years/60 k miles; my car is still within this coverage period. I decided to bring in the car to my local dealership gosch Ford escondido in escondido, CA to have it inspected and repaired. A technician evaluated the issue and provided the following diagnosis on the service report: "verified airbag light, checked codes, found b0061:13 in oscm for passenger pretensioner, performed ppt, found pretensioner to be internally open. Need to replace pretensioner. " however, the service department contacted me to inform that the repair would not be covered under warranty and that repairs would be at my cost. I have contacted Ford corporate customer service to escalate and am awaiting a response.

So for some reason my airbag light will come on and off for a few weeks. When its on my high beams and dont work and when its off my high beams work. Then today , my car battery randomly died on me twice. It started shaking uncontrollably before then. I thought maybe I needed an oil change because I was close to due for one. When I got it they said my oil was fine and their system checked my battery as working fine too. Also when I try to step on my gas sometimes the car with skid before taking off. Im not sure if anyone else has these issues. I've only had this vehicle for 4 months and it's fairly new. It had one owner before me.