Airtel — Refund issue on broadband connection

I disconnected my Airtel broadband connection 2 months ago. I was calling for customer care for refund. No use till date. I couldn't connect them, when I checked with their agency outlet. They are saying no such refund option after broadband disconnections.
I disconnected my account but my money is with them.
When I asked for new connection they where asking me to deposit some amount and told that the amount will be refunded when we disconnect their services. But nothing is happening.

Very bad service