call 198 , response for automated voice , but don't select any particular service, then it will give the option to talk to one to one executive.
at times it can be very frustrating to contact the customer care executives. Most of the time rather that finding a solution to your problem they hung up and keep you waiting for long. It is better to send a complaint in written and include the email id of some senior executive. I hope it helps.
Try 198, 121 or 123.
One of them will surely work.
198 mostly works for me
The web page the already existing answer refers to is not functional.
