Brake Drum Wheel Cylinder problems of the 2008 Mazda CX9

O was operating the vehicle and the brakes became spongy and failed to stop the vehicle unless I increased the effort to depress the brake pedal down. Foot has slipped on occasion causing my ankle to be struck on the pedal. I now down shift gears to slow the vehicle to assist in stopping while keeping even further back from vehicles in front of me. Currently, no recalls are out specifically for my VIN but the year make and model are consistent with the current recalls out for bad master brake cylinder and brake booster. Both of which have failed in my vehicle. I have contacted the gaithersburg MD Mazda dealership and they insist the vehicle is not recalled and are suggesting I pay out of pocket for a known recall on these vehicles. Any assistance would be greatly appropriated. Thank you.