Ombudsman for Motorindustry -no communication

I have a dispute with Mercedes Benz regarding the unavailability of Mercedes Benz doors whilest the car was still under factory Guarantee. A complaint nr 320701 was supp**** to me in Oct/Nov 2014 but since that I have had no reply/feedback from the Ombudsman. I have send faxes, emails and tried the phone -no response. What is the use of the Ombudsman if one does not get feedback from him