2016 Toyota Camry brakes problems

While in a parking lot in gridlock traffic leaving an event my 2016 toyota camry made a loud thump noise as if was releasing the brake. The car then literally made a sudden acceleration forward and it would not stop. Because it was gridlock in the parking lot the only way it was going to stop was to hit a person or another car. My camry hit 2 cars and finally stopped. The car at the time was not in motion but in drive with the foot on the brake

Tl* the contact owned a 2016 toyota camry. While driving 30 MPH, the accelerator pedal became stuck in the depressed position and the vehicle accelerated to 80 MPH. The brake pedal failed to respond and the vehicle crashed into a pole. The air bags deployed. A police report was filed. The contact sustained a fractured sternum that required medical attention. The vehicle was towed and deemed destroyed. The manufacturer was not notified of the failure. The failure mileage was 6,700.