I can’t open that doc. But I have never heard a more ridiculous statement about a filter change. My first call would be to VW customer services with a complaint. Try and get a download of the service information for your DSG model year / VIN.
If it was me I would insist undertaking the service again following VW schedule. Bear in mind that the oil as has now run through a dirty filter. Note the DSG service requires plug in to diagnostics to record oil temp and check parameters. Good luck