Accelerator Stuck problems of the 2014 Chrysler Town & Country

The accelerator jammed at full throttle as we were making a right turn. There was nothing depressing the accelerator, but the engine was racing at full speed. The light was red, so I was forced to used the brakes to keep from hitting the car stopped at the light in front of us. The brakes weren't going to hold the vehicle back for long, so I shifted into neutral and turned off the engine. When I turned it back on the accelerator was still stuck at full throttle. Only after turning it off a second time, completely removing the key from the ignition, waiting for all the lights on the control panel to dim, and restarting it did the accelerator return to normal. Chrysler insists that it was the floor mat depressing the accelerator, but there wasn't anything in the way of or jamming the pedal at all. It was free and clear. The vehicle smelled very hot and a red lightning bolt immediately flashed with and oil change due now indicator.