[Resolved]  Hathway Cable & Datacom — hathway sending sms of legal notice to clear dues for closed connection

I used hathway connection 2.5 year back. The connection was closed due to relocation in other part of the city. Connection was closed in jan-feb 2016 after clearing all dues and hathway personnel had come to my new home to collect the modem. Still i kept receiving bill for which complaint was sent on feb 9 2017. After all this still i received sms for legal notice and clear balance due.
Please help with the same as i am not going to pay for connection that was closed more than 2 years back following a proper closure procedure.