So what's the delay? They should make it a priority and fix it. Don't leave it for too long ... who knows what else might get damaged. I would demand a free loan car and if service refuses to give one, go and see your sales rep or Darren Brandon.
Good luck and keep us updated.
E92 M3 2007 - ///PE with Test Pipes and BPM Stage II; CF Interior & Splitters; CIC with Connected Drive