Hathway Broadband Internet, Bangalore - Harassment from hathway

After offering a *+* months extension, hathway stopped providing internet after a period of *months, repeated calls only to be assured by the customer care that i would be given an extension but there was no action from anybody. Numerous mails sent were also in vain just to receive automated replies without any action, even after asking for disconnection. This was all in the month of April **** and despite being cheated by their ineffective brand, i decided to disconnect and since they wouldn't come for disconnection also i requested for relocation and told them to disconnect. And since ** months i keep receiving calls from hathway at least two to three times everyday saying there's a "comeback offer". Numerous attempts to block, shouting, asking them to de- register my number has been in vain. This is harassment and i am unable to take any action in this regard.