IFB Supremo Dx — Pathetic After Sales Service

My complaint No.3750684 dated 16-11-09 for IFB machine under AMC is not being attended, I have reminded them everyday and call center says it will be attended today but nobody comes. What action can we take? In spite of the repeated request to the help line no service persons are attending the machine. I am not able to under stand the reasons for this casual attitude. No higher officials telephone numbers are available for the redresal. I am really fed up this attitude.