[Resolved]  Airtel — no network, and bill generated after cancellation request

Address:

600116

I am an airtel customer for the past 3 years. For the last 3 months (From the month of may 2017) my broadband connection was disconnected due to some cable issue on airtel side. I requested for disconnection to change my network.
I am still waiting for airtel to disconnect my broadband (29/07/2017). I have paid all my bills till the disconnection request raised.
Now after disconnection request airtel has generated a bill and is forcing me to pay.
I had also communicated my request through mails on 14 jul 2017 (Ref no :[protected] and
I asked the bill for the used data through customer care and i am ready to pay that. I also raised a new request case to resolve which is still not resolved.
Now i am getting call from airtel person, who called me and just says himself as collection agent speaking in a threatening voice.
How can i contact airtel directly to pay my bill and end my broadband connection??