A lot of details missing here. Did you get the crash data download? Can you prove you didn't have your foot on the accelerator? Did you remove your foot from whichever pedal it was on to then see that wheels were still turning? Once the car started accelerating, did you remove your foot and re-apply? Did you just let go? Or did you just push harder convinced your foot was on the brake? As many of the participants in the thread point out, you really can't remember what you exactly did. But you are convinced that the car was at fault. It's the only way to rationalize the error you made. Sorry I can't believe your story.