Airtel Broadband — Mental Harassment

Address:

Bangalore, Karnataka

I used Airtel Broadband (account Number : [protected]) for several months in Bangalore. I was moved to a different place and couldn't able to pay the bill , hence the line was disconnected in the end of 2012.
In 23rd January,2013 I got a settlement letter with a subject line (Settlement Letter - [protected]_kk) from Airtel Representative (sent by : a_Mahendra.[protected]@in.airtel.com) in which they kept [protected]@gmail.com and Avinash.[protected]@in.airtel.com in cc, stating an amount of Rs 1850/- as the settlement amount and it is the full and final settlement of my account and thereafter this will be treated as "No Due Certificate". I paid the amount on 30th January,2013 in cash to the Airtel representative and he also gave me the receipt which I still have.
But I again got a mail on March 13,2013 stating that there is a
a net outstanding of Rs. 1539 which is not paid from past few months. I replied back to that mail with the scanned copy of my receipt and "Settlement letter". But to my surprise I again got a call from [protected]( Claiming Adv Arjun of Delhi Court) on 28th May,2013 claiming that there is a case registered against my name in Delhi by Airtel. When I stated him my situation he asked me to go to my nearest Airtel outlet before 2 PM and varify my words from Airtel representative over there which I did accordingly. At that time he said it's a mistake from their side and the case has been dropped. Again today 20th June,2013 I got a call from [protected](claiming Sandeep from Delhi court) and stating that there is a outstanding amount in my name and again stating there is a case registered in my name in Delhi. Any help with this regard to close this matter would be highly appreciated. Please advice and help. Calls/threats such as this causing havoc in my working life and as well as creating mental stress.

Regards,
Santanu