2013 Ford Focus seat belts problems

Tl* the contact owns a 2013 ford focus. While driving at 55 MPH, there was another vehicle approaching the contact's vehicle head on. However, the contact swerved off the road to avoid crashing into the other vehicle and crashed into a poll. The contact stated that the air bags did not deploy and the seat belt did not remain secured. The contact hit her head on the windshield and fractured her wrist. The dealer was notified of the failure. The failure mileage was not available.

I had to remove my seat belt while driving to readjust it to fit better and it would not relatch. I pulled over and tried again and after many tries, the belt would not latch. I got out of the car, adjusted the seat and then it would relatch. It continues to sometimes latch, sometimes not. Other times when my seat belt is latched, the seat belt warning light will come on. Other times when the belt will not latch, the light will not come on.