Surely if it's a known fault, and they have admitted as much, then being serviced by a main stealer or respected Indy wouldn't change that fact, I would take up direct with vw dealer sounds a prick. Kind of worrying for me since I'm taking mine to it's first Indy soon for service, cambelt, dsg service, aircon refresh, brake fluid change etc.
If I'm Reading the bulletin correctly this is for gti's 06-07 only....