Regular maintenance includes BG44k fuel system cleaner? While I love me some BG44k, that’s what I’d put in the car the tank of gas BEFORE the oil change, not right after.
As others have said, please locate an independent Porsche mechanic. You’d have paid probably 60% of the total or less.
They also sprayed your A/C evaporator to keep smells out (Frigifresh) which is fine. Lots of Wichita, KS finest product went into or on your German panzer. Good stuff, but probably additional profit for the dealership service department more than VAG recommended.