who to contact at Audi UK re. issues

[goldsax]

my 4.2Tdi has the gear box issue i.e. a harsh 4 to3 downshift.
looking at this forum there was a TSB issued for this.
called Audi Leicester yesterday, they had nothing on their system.
except the last service at 100K the rest were done at Audi dealerships.
i want to contact Audi to see if they can offer any goodwill?

if they dont will a good Audi specialist be able to do the same: blue gearbox oil and gear adaptation?

cheers raj