No progress from Isuzu

My D-Max double cab 1.9 Tdi has been with the dealership for 6 weeks. They are waiting for Isuzu SA in {{ort Elizabeth to give technical assistance and Isuzu SA says that the dealership has not given feedback. Between Isuzu SA and the dealership there has been no progress on the warranty matter in the last 3 weeks. It seems as if no one is interested in resolving the matter. I also cannot get past the customer care number/people as they keep on advising that they will follow up on the matter. It is not going anywhere and whenever I speak to anyone they blame the other one. So please if this message could get to a person or department that can make a decision on this matter I would appreciate it. The reference number is 87164.