Bharat Sanchar Nigam [BSNL] — disconnection of landline connection

I have submitted request letter to disconnect my landline bearing number [protected] including broadband connection on august 2018 and till date they have not disconnected my land line connection and bill received upto date. I have repeatedly requested the concerned but till date the land line connection has not been disconnected by concerned authorities. It is requested that necessary instruction may please be issued to the concerned authorities to disconnect land line connection on priority to avoid unwanted correspondence against the subject matter with bsnl. For which act of action it may reduce man power on bothside if action taken in time.