2018 Subaru Outback brakes problems

I went to to stop at a traffic light and my brakes failed. I swerved to miss the car directly in front of me. I hit 5 other cars and the car flipped. The fire department had to cut us out of the car.this was a busy street.

Tl* the contact owns a 2018 subaru outback. Each time the brake pedal was depressed, the vehicle accelerated without warning. The contact had to apply excessive force to the brake pedal to slow down the vehicle. The failure recurred three times. The vehicle was not taken to a dealer or an independent mechanic for diagnostic testing. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 4,400.