Airtel — non payment of deposit amount

Address:

Bangalore, Karnataka

Sir/Madam,
I had Airtel postpaid connection [protected]. During that time I had deposited Rs 6000/- with Airtel for international roaming connection. ( bill no 839 dated 30/6/07). On March 4th 2012 I converted post paid to prepaid connection. while converting the Airtel outlet at Vijaynagar told me that the deposit amount will be returned within 60 days.
Till now I have not received the amount. When I checked with at customer care, they ask me to contact later. This is happening for quite some time. This regard I had written mails to Airtel presence on Oct 21 2012 (nodalofficer.[protected]@airtel.in; [protected]@in.airtel.com) and later also. So far I have not received any response and money from Airtel.
Request your help in solving this issue.

Thank you
Subhash Rao