^^ Agreed a little more detail would be helpful.
That said, I have a 2012 JSW with the DSG, and had an awful problem with it starting about 3-4 weeks after I got it, and lasting for about 4 weeks until I took it to the dealership.
My scenario was after a cold start I would drive through the parking lot at work at about 5-7mph with constant accelerator position, and the car would start to buck until I got completely off the accelerator, came to a stop, then started again. This happened about 50-75% of the time, and would often recur after the stop/start routine. It didn't feel like an engine problem to me, though I couldn't say for sure. During this time the weather was moderate - 70ish degrees.
When I took it to the dealership and described the problem, the tech said the best thing for him to do was reset the gearbox (no software update was applicable to my vehicle). He did this and I haven't had any problems since.