2017 Lexus Nx

I was pulling into a parking space at a gas station and the vehicle took off at a fast speed and I could not stop the vehicle, the “parking assist light came in saying parking assist malfunction, I tried braking and nothing, the car kept going I hit something then it stop as I put the gear in park, the passenger electrical window won’t operate from the driver side, Lexus refused to take responsibility of an electrical problem occurred as the vehicle malfunctioned, at the shop they claimed nothing was wrong, with breaks or no electrical problem, there is something wrong with a part that causes difficulty getting the tire off and in turn damaging the tire , this was told to me be a auto repair shop, Lexus did nothing to take responsibility nor did they treat me well, as if I just decided to ram my car into something, I later read other reports where this vehicle had same problem with the vehicle just taking off and driver unable to stop the vehicle , I only had the car for about 4 months, and theirs all happened, I was afraid to drive it for awhile, but they wouldn’t even swap the car out for another

I stepped out of my car in our condo complex after parking. and turned off the engine only after i stepped out completely. vehicle starts rolling. I opened the door so wide, in panicked jumped back with right leg pressing on the break/ turning engine , shift gear to park, as i have no control over the door. As i am trying to hold on the steering wheel and doing all the actions mentioned above , the door swung hard with my leg on it while the car is in rolling motion. It did stop , almost hitting the parked pickup car. damaged the door and the front fender. Dont recall exactly what happened, it possible that i may have turned it off while it is in drive (?) but vehicle is not moving. Lexus a luxury car made it too convenient with auto parking brake , doesn’t not have a safety feature to prevent roll off accident when vehicle is at full stop and engine turned off.(unlike prius). Repair estimated at $3,000-$5,000.