2018 Jeep Grand Cherokee fuel system problems

Tl* the contact owns a 2018 jeep grand cherokee. While driving 50 MPH, the vehicle stalled without warning. The contact was unable to restart the vehicle. Prior to the failure, the contact noticed an abnormal fuel odor and smoke coming from the passenger side of the vehicle. The contact was informed by the mechanic that the failure was not due to NHTSA campaign number: 18v048000 (fuel system, gasoline). The vehicle was not repaired. The manufacturer was notified of the failure.

My 2018 jeep grand cherokee just accelerated by itself up a sidewalk at a parking lot and ran into the pillar of a building. I then put it in reverse and it accelerated into a car parked beside me. The front axle snapped completely even though the impact was not tremendous. The air bag did not deploy. This vehicle has all kinds of impact sensors and usually brakes on its own even when it senses a leaf from a nearby bush and none of that worked. This happened just yesterday and I'm at a loss as to what to do.