Brake Loud Noise problems of the 2013 Hyundai Sonata

Vehicle was not used for about 4 weeks in February. Then the car was started in reverse with the foot on the brake pedal. Pedal went mushy with little to no pressure resulting basic loss of brake function while making loud noises. Had to stop vehicle with parking brake. Had vehicle towed to dealer. Service manager drove vehicle, acknowledged the problem, and indicated that rust had accumulated on rotors. He said high/low spots due to rust can result in loss of brake pressure, and loud noise was a result of brake pads rubbing on uneven surfaces. After dealer technician drove several miles and applied brakes, rust wore off and brake function returned. The dealer service manager said the car should be driven every couple days or at least once a week to prevent this from happening. He indicated he could turn the rotors but the rust would just return. I have never owned a vehicle in 30 years where the rotors are so prone to rust resulting in brake failure if not driven for 4 weeks, much less a week. Thankfully this was not noticed at higher speed on a road or this was an accident in the making. I believe there could be a rotor material design or quality issue that is promoting corrosion at such a rapid rate. Dealer's invoice is attached for reference.

My 2013 Sonata was making a loud noise when I applied the brakes. I took it to my mechanic who stated I needed brake pads and rotors. I was told that it was suspicious that my rear brakes were almost new and the front were worn down to the rotors with 18,000 miles after owning the care over 2 years. The dealer denied any recalls on the brakes. A few months prior, this same car drifted out of parking onto the middle of a busy road. When I took the car to the dealer, they denied any problems with the car. I called the corporate office and was told to take it to another dealership. Hyundai dealerships does not treat their customers with respect and they do not own the problems with their vehicles.