Car Accelerates On Its Own problems of the 2020 Chevrolet Equinox

I was pulling up to a family member's car port, behind their car. The car port has a grass portion leading up to the gravel section where they park their car. I pulled in slowly when my 2020 Equinox suddenly accelerated! I was on the brake, but the vehicle kept accelerating causing it to run into the back of the family member's car. My vehicle continued to accelerate shoving the car forward sandwiching it between my vehicle and their home. I was able to put it in neutral as the engine continued revving up the rpms. I put the vehicle in reverse with both feet on the brake. The car lurched backward. I managed to put it in park and shut off the engine. I contacted my dealer (my vehicle has 1656 miles on it, and I have only had it for about one month). I talked with someone in the service department and was told that my floor mats caused it to happen because they had seen this before. My floor mats were well below the accelerator pedal. The vehicle rpms surged. Even if there had been a problem with the mats, I don't think the rpms would have jumped up as high as they did. The family member's vehicle was totaled. I am waiting to hear from my insurance CO. They vehicle is being towed to a dealership.