Brake Loud Noise problems of the 2014 Kia Motor Sorento

On four different occasions over the course of about 10 years, with foot pressing hard on brake toward bottom left side of the brake, the car accelerated. First time, I was at an atm. Foot was on the brake. I was leaning out the window getting money out of the atm and the car accelerated. A loud noise of it ramping up and then it jolted forward. I immediately sat back straight in the car keeping my foot on the brake. Within about 3 feet the car stopped. Second time was at a fast food restaurant. Leaning out to get the food, the car accelerated. Made the loud ramping up sound. Jerked forward and immediately stopped. Third time, at a pharmacy drive through, leaning out to get the medications, foot on the brake. Car accelerated. Loud ramping up noise. Lunged forward about 2 feet then stopped. Most recent time, I was getting a ticket at a parking garage gate. Leaned out to press the button to get the ticket. 100% positive my foot was on the brake. Pressed hard on the bottom left side of the brake so as to not slip. The car made the ramping up sound, then accelerated. When I heard the noise, I immediately sat straight and kept my foot on the brake the entire time. It went about 15 feet without stopping - the entire length of the gate bent and then scrapped down the side of my car. (tried hard to drive around it after it bent). I released the brake and then pressed it again and the car stopped. I was able to park it in a parking space immediately in front maybe 100 yards away. I took it to the dealer after the last incident. They were unable to replicate the issue. They insisted my foot must have pressed the accelerator or the carpet must have been pushed up under the accelerator (the car has rubber matts, there is no carpet) as a work around, I now always put it in park with the emergency brake on whenever I'm at a drive through.