Polo Vivo 1.4 CLP Rev hang

[suhail.m3]

Hi, I have a 2012 1.4 polo vivo the revs up on its own when changing gears or in neutral. It started a day ago and came out of nowhere. Mileage is just over 92000km and it's been serviced regularly. The throttle body flap seems to close fine, I scanned the car and it had no codes. No warning lights, no loss of power. If it's in gear it will sometimes accelerate on its own as well. Braking drops the revs.
I don't want to start replacing the throttle body or pedal sensor and it's not that.