2016 LEXUS NX Unknown Or Other Problems

Upon entering a parking lot yesterday and heading down a small ramp my 2016 Lexus NX 200 spontaneously accelerated and even with my foot on the brake did not stop. I was unable to control my car and ending up hitting a tree. All of the airbags deployed; the windshield cracked; the body of the car was severely damaged and I suffered injuries. The car was brought to a body shop and is available for inspection. Fortunately, no other cars were in the parking lot and no one else was hurt. The car will be inspected over the next few days. There weren't any warning signs. I cannot say for sure what mechanical failure occurred to cause the accident, but there was clearly a mechanical failure as the acceleration was beyond my control.

WHILE DRIVING ON THE FREEWAY AT 72.5 MPH THE BRAKES LOCKED UP WITHOUT WARNING CAUSING THE VEHICLE TO SKID 60 TO 70 FEET, CRASH INTO A CONCRETE CENTER DIVIDER AND AIRBAGS WERE NOT DEPLOYED. MODERATE INJURIES. LEXUS DID AN INSPECTION 32 DAYS LATER AND THEY HAVE NO EXPLANATION. THE ACCIDENT OCCURRED APPROXIMATELY TWO MONTHS AGO ON AUGUST 9 , 2019. VEHICLE STILL SITS AT THE DEALERSHIP WHILE I MAKE PAYMENTS, PAY FOR A RENTAL CAR, AND ENSURE THE VEHICLE. LEXUS HAS NOT GIVEN ME ANY WRITTEN EXPLANATION AS PROMISED.