2010 Toyota RAV4 brakes problems

I was leaving my home in my 2010 toyota rav4. I put the car in reverse and it instantly began to accelerate at a very high speed. I immediately pressed down on the brakes as hard as I could. However nothing occurred the car continued to reverse rapidly. I shifted into neutral but it was a small space and by then I was near the stone fixture which the vehicle hit. The fixture which was solid stone was in the ground, it was uprooted by the vehicle.

Tl*the contact owns a 2010 toyota rav4 . While driving 25 MPH, the contact applied the brakes and there was minimal vibration causing the brakes not to engage. The contact then shifted into neutral gear when the engine rpms increased. The vehicle lunged forward when the contact applied the brakes with extreme force and stopped the vehicle. The vehicle was taken to the dealer and they stated that they would perform a diagnostic test and let him know what caused the failure to occur. The vehicle was not repaired.