Pulling this back to the OP from arguing in the traditional STW style about the definition of an automatic gearbox 8O , I had the same issue in the UK Molgrips.
VW phoned at 4:45 (when the car was due back at 5) to say “that’s the service finished, oh by the way we’re just going to change the DSG fluid, that’ll be £200 extra” or something similarly ridiculous.
I threw my toys out the pram and told them not to bother, before phoning round all the Skoda/Seat/VW/Audi dealers and independents in the area, before, you guessed it, going back to VW the next day tail between legs and getting them to do it. From what I can see everyone wanted a small fortune for it.
Cambelt and waterpump on my older Mk5 GTI was another matter, and was considerably cheaper at independent.