For anyone in the North East region I highly recommend the independent Audi centre linked below. Very honest, reliable and trustworthy.
See my previous posts for my experience of them.
http://www.swiftmotorengineering.co.uk/
So glad you got sorted Gary :) it's crap how much Audi tried to rip you off! But at least the silver lining is that you've found an independent specialist who you can trust! Feel free to recommend them on the forum. Here is the dedicated thread for recommendations:
Cheers
Steve :)