Accelerate but then it jerks hard and sometimes stalls?

So, I just bought the vehicle listed above Q7 Quattro. There are no service lights on but when I start to drive it goes then drops in acceleration and jerks at the same time before stalling. Still no check engine light or any other service light. Decided to do the reset trick where you hold the gas pedal for 15 seconds, turn the vehicle to the on position and then turn off for 4 minutes then turn on and drive it for 15 minutes, did not work. Decided to then clean the Throttle Body and it seemed A little better but still skipping or jerking when I'm accelerating? Does anyone have any recommendations or has anyone delt with this problem before or similar and what procedures did you do to correct the issue?