BSNL — worst customer care service in Kerala

I have been trying to call bsnl customer care service for bsnl mobile (1503) for last few months but never gets connected. After following the ivrs it ask to wait for some time before getting connected to the executive but WE NEVER GET CONNECTED. I have tried to call them many times to Get my caller tune deactivated but my calls are either never picked up or if picked up never answered by the executive , they press different keypad buttons (known from the keypad tune) and then maintain silence. Very disappointed of this service as I am unable to deactivate my bsnl tune service and the format is not available in internet too. Please help....... Thank you Abhilash O