Brake Grinding Noise problems of the 2007 Toyota RAV4

I own a Toyota 2007 Rav4 which as been in the dealerships shop over 10 times for the same two issues brakes and grinding noise, per Toyota each time it was different, but I know it was the same two things. It's like Toyota is falsifying customers car issues with their own words instead of making proper documentation. It started off with the brakes when I first purchased the car they were making a noise and when going over speed bumps the car would accelerate instead of stopping, but I thought this may be an added feature to the new car. The first real incident is when the car would not stop and I crashed into to a side rail. It didn't do much damage and it total about $400. 00. The car is making a metallic noise in the suspension and this was reported, but each and every time Toyota's techs drives with me and my husband while we driving the car to duplicate the noise Toyotas techs said this noise was normal. We knew this noise wasnt normal behavior of a brand new car, I took it to another auto shop and they verified that the noise was in the suspension system, that Toyota would need to address the issue because the car was still under warranty, and it would cost me money to locate the noise. When I told Toyota they said they give a car until they could find the issue, by letting their field tech look at the car, and I asked when this tech would be available. I wanted to see this person look at the car, but they came up with a million and one reasons that I could meet with the tech? after talking to people from their corp office about the metallic noise and the brakes Toyota said, since we can't find anything wrong with the car its under warranty so if something happens it will be fixed. What I dont understand is why should I have to wait for this car to kill me or my family for the company to look at their faults because all we did was purchased a car from the top of the line auto makers to get this kind of treatment?.