Hi all - Wondering if somebody could please help!

I picked up my Audi A3 2.0 TDI (Jan 05) yesterday after having the timing belt replaced last week.

I have now noticed that there is a distinct lack of power to the car when starting the car up from idle, often causing the car to now stall when accelerating in 1st gear.

Once I am out of first gear the car runs smoothly and fine - I am not a car expert so will be contacting the garage that carried out the work to take a look at it, just wondering if anybody has any ideas on what the problem might be so that I have some ammunition to take with me?

The best part of the car is the turbo acceleration from idle/first gear and this has now disappeared :-(

Please help!