Noise at low speeds (Octavia mk2)

Hi,

I had the garage service the gearbox and change the flywheel of the DSG gearbox on my Octavia MkII.

However, when the engine is warm the car starts to produce a noise when at low speeds and low revs (at just over 1000 and not when it’s changing gears).

See the link to the video attached.

This noise does not occur when cold.

Can anyone help with this as my garage don’t seem to be able to fix it...

https://youtu.be/Rw-DgZpPjhg