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.
2007 E92 6MT - Silverstone II with /// Performance Exhaust with ACM Test Pipes and BPM Sport Stage II Dev-Tune - Proper engine warm up, 12-monthly oil change, Castrol TWS 10w-60
2011 F25 X3 3.0d