Hathway Cable & Datacom — unwanted promotional messages

Address:

400080

A/c no. [protected]. We dont want hathway to send unwanted promotional messages. We have stopped using services of hathway since last 5 years, till now they have been sending this messages. The do not have a email address to register this complaints. I had thereby sent a mail to their accounts team, this dumb team could not understand my reason for writing this mail, instead they asked me to show the previous bill.

I request hathway to stop sending this unwanted messages or i shall be forced to escalate the matter to the concerned authority