Hey Chris, I have to agree with you and I know if it were me I'd have it looked at.
But as Trevor has pointed out a weep isn't as bad thankfully but I would say it's not appropriate on a 3 and half year old car with 30k on the clock.
Whereas id expect a weep on my 15 year old a6 that's done 327,000 miles!
youve done right speaking to Audi customer services but I agree that I wouldn't hold out much hope for anything from them.
However when the car goes in to Audi, mention to the service advisor that your not happy and that this should have happened.
I say this as they may be able to get money off for you. They can even contact Audi directly to try and get manufacturers good will.
I tell you this as the turbo blew on my a6 (my dad bought it new) just out of warranty and Audi paid some towards the cost of the repair.
But I have also worked at a Volkswagen service department and have done good will for customers when I worked there.
Hope iv helped
cheers
steve