Hathway — Stop Tele callers and promotion SMSes

I relocated to a different area in Hyderabad to which Hathway could not offer their broadband service. But they literally call me everyday to get a new connection. I don't want their services or promotional offers via calls and messages. This happens despite my patient replies to their executives to remove my number from their call list. I DON'T WANT TO RECEIVE ANY FURTHER CALLS AND MESSAGES FROM HATHWAY BROADBAND AND CABLE.