NHTSA Complaint #11654233 — 2023 FORD MUSTANG MACH E

I have a 2023 Mach e premium on lease.  
I drive using single pedal mode. 
Three days ago I pulled into a parking spot in front of a restaurant in a plaza. When I took my foot off the accelerator the car came to a complete stop (as it should have ) … about a half a second later, before I could put the transmission into park, the vehicle went full throttle and jolted forward up over the curb onto the plaza sidewalk and crashed into a full brick column. I slammed on the breaks as fast as I could, but if the brick column was not there, we would have crashed into the restaurant. There is damage to the front drivers side of the vehicle. The airbags did not deploy. The beeping sensors never went off. Honestly, the experience scared the crap out of me. We’re lucky no one was injured. 
Ford has the car at the dealership now. 
they told me that something seems to have malfunctioned. They told me that the car should have deployed the airbags, the sensors should have went off, a deceleration stamp should be logged in the vehicle data and it should be telling ford that the car experienced a collision. None of that happened. 
needless to say, they are now telling me that because they can’t mimic the problem, Ford is instructing them to return the vehicle to me. 
they have nothing to repair, and are not taking ownership for the damage. I honestly don’t want to take the car back. 
my wife isn’t comfortable driving it anymore as she feels it’s a safety risk.