Welcome Jim, and thanks for joining.
Shall we start with the simple solution first:-
Since you have bought it remotely and it’s not practical to return it to the Audi dealership you bought it from, does your warranty allow you to take it to a convenient-to-you dealership? I would expect it to.
You obviously first have to measure the minimum remaining pad thickness on the most worn pad, and to do that properly, the road wheels will need to be removed. If you or anyone else does that without the authority of the selling dealership, then it could affect your warranty.
If it were mine:- e-mail the dealer who sold it to you, and outline your concerns, and enquire whether you can book it in at a dealership closer to you. In anticipation that any dealer may not be able to accept it pre Christmas, and in respect you are dealing with brakes, ask them for agreement to get it inspected by a garage of your choice.
Please let us know how you get on Jim.
Kind regards,
Gareth.
p.s. Min. thickness on inspection? Not sure, but would expect below around 4mm remaining would justify replacement.