When I step on the brakes it slows initially and then it feels like the brake just lets go of its grip and the car keeps going or even accelerates and you have to slam on the brake to get it to stop. The last time this happened, it resulted in a crash with my daughter in the car. Toyota is telling me the brakes are fine but I do not feel safe driving it. There have been no lights or warning lamps and Toyota says they inspected the issue and found nothing but it has happened multiple times.