on 4/17/2024 while exiting bank drive up lane in parking garage car suddenly accelerated from 5mph to maximum, both feet on brake had no effect, drive lever did not engage neutral or reverse. Car exited garage and was able to be steered onto median into a tree to stop car. Air bags deployed. Thankfully no one injured, if there had been a pedestrian or another car there would have been a bad outcome. Attempted to contact Tesla but unsuccessful locating telephone number or online contact to report, was able to send text to 24 hour tech assistance line, no response as of now.