Car Accelerates On Its Own problems of the 2017 Toyota Avalon

I reported noise when I made turns to the left or right. I bought the car into the dealership and advised of the issue. I was told that they would check all components of the car and change the oil and rotate the tires. This was at 19,611 miles. I was told that the power steering sound I heard was electric and that it was fine. I returned to the dealership on 3/10/18 and the car was checked again at 24,650 miles. The car was reported fine. Then on 4/26/18 I have an accident because of unintended acceleration. The brakes didn't work or any of the computer safety features. I was stopped in a parking lot waiting for another car to back out. The car passed and I tapped the accelerator to pull into the space. The engine started making accelerating noises and the brakes wouldn't work. I ran over the yellow concrete block and out of the parking lot into the vacant lot next door. I was able to slow the car down by putting it in neutral. The car is damaged and I have injuries. Toyota refuses to take responsibility.