NHTSA Complaint #11596217 — 2019 NISSAN ROGUE

I was driving and suddenly the gas pedal gave out my vehicle never shut off but would not accelerate even with trying to floor the pedal. Then it jolted off into traffic and the gas pedal went right back out within 45 seconds and glided into a parking spot. It took me 3 hrs to find a mechanic to come to me because it was after business hours and there were NO LIGHTS on the dash and engine was running extremely quiet code P0776 was what his computer said and nissan dealers and other mechanics all are saying I need a new transmission. The vehicle is jolting on and off coming out of parking spots hesitant on acceleration. Another mechanic didn't pull up any new codes just previous codes and as I've said there has never been a light on my dash and I get regular fluid changes filters tires etc, I was told the alternator is losing voltage it should be at 14 or better and mines was at 13. I don't even know where to begin seeing as though there are no lights ever on my dash and I've had my truck for almost 4 years and now it's a guessing game.