Better advice would be to simply reject the "offer". It's a massive money making scheme for the dealer network, almost all "profilt" as the actual products used are (or at least have) off the shelf (or equivalents).
Either spend the money on buying your own detailing (cleaning, polishing, sealing, waxing) products from a reputable supplier (such as clean your car), or pay a proper auto detailer to do a correction with a DA/rotary (even a brand new car will likely need one, my 2013 A4 did) and then a decent seal/wax for you.
Money spent on "supagard" or equivalent "services" is just money down the toilet in my experience. Surprisingly on the A3 Saloon order I made this week, I've ditched all of the dealer offered "services" (GAP, Wheel protection, gardX) as they are either useless, or available elsewhere not only cheaper, but with better products/services (such as ala.co.uk for the GAP insurance).
Granted this is now "after the fact" so you are stuck with what you bought, but I'd still recommend getting some advice from somewhere like detailing world and then either buying some vastly superior products, or just paying a specialist to do it if you don't fancy the graft.