Brake Grinding Noise problems of the 2007 Toyota Corolla

Had the front brake pads and rotors replaced on car March 1, 2013. A month and a half later I heard grinding noise from left wheel. Took car in on 4/11/13 and was told brake pads and rotors were fine, but that the hub and bearing were failing on the left. Was also told this was rare that that they don't usually see a hub and bearing failing at this mileage. This is a serious problem and if you do not do anything about it your wheel could fall off. I was advised by someone with experience with this problem to go ahead and fix it which I did on 4/16/13. Was also advised by this same person that the failure was probably the result of a factory defect, but at this point there is no way to prove it and the car is out of warranty. The warranty for this repair is only a year and the failure rate after fixing this type of issue is high. I no longer trust my car!!!!!.

Problem: squeezing / grinding noise in brakes which sometimes happens as one drives slowly and brakes. The problem started after I had the car for 2 and 3 quarters years. Toyota technician looked at the problem 2 times and mentioned that everything is normal. After that a Toyota customer service representative called me and mentioned that the brakes are fine and that a certain repair at my cost could be done. When I asked the Toyota customer service representative to explain in writing what the exact problem is and how to solve it and she agreed to do so. Previous communication had also be in writing. But Toyota has not done so as to date. Please note that the exact model is Toyota runx, based on Toyota Corolla 4 doors.

Ever since my vehicle was purchased, I would hear a squeaking/grinding noise coming from the front of the vehicle when I hit the brake pedal. The sound only existed when I put the vehicle to reverse. However, near the 20,000 miles point, the sound has become louder and exist even when driving forward and braking. I have reported this problem to three different Toyota dealerships and they are unable to repair it. The problem occurs when I need to stop the vehicle and push on the brake pedal. There would be a loud grinding noise and sometimes the brake pedal would also vibrate. The Toyota dealerships have changed my brake pads and performed several inspections. However, it did not solve the problem. Now they are refusing to do anything and claims that the problem is normal (at nearly 60,000 miles). I feel that there is something really wrong and unsafe about the situation. What if the brakes fail at any moment? what steps should I take? even Toyota customer experience service is telling me that the dealer diagnostic says it is a normal condition.