If you are frustrated enough to post what you have done on this thread, then you've almost made up your decision.
What is your deposit, and would you lose it, and have you got a great deal, and when was it ordered?
The above would dictate the extent I would do the following:
Call them back, ask again, say with respect I know you can get that information and remind them you are paying a lot of money for the car and request to speak to someone who will give you an answer. Don't take no for an answer; ask to speak to the salesman's boss if you have to.
Then go to Audi customer services and ask similar questions again.
And then cancel the order if you get nowhere or do not hear the answers you want to.
BTW - a bit harsh to slate all dealers as you've done in the title of this thread.