Accelerator Stuck problems of the 2014 Audi Q7

I bought my Audi Q7 certified pre owned from an Audi dealership. Soon after I got it I realized that the accelerator sometimes got stuck on a fast acceleration. I called the dealership and asked them to check for a recall and also took it in for evaluation. They said it was because of the floor mats, the mats were removed/changed. The problem still exists, and as I check for recalls with that issue I don't see any in the system. The problem is potentially dangerous, the first time it happened I had to really get the car under control with power braking and other emergency braking techniques, or I would've crashed. I just have to remember now to expect a run-a-way car situation if I have to quickly accelerate: first time was a 0-60 mph acceleration, other times was an the highway acceleration to change lane or overtake acceleration took over. I am also not sure what to do about it besides getting rid of the car!.