[Resolved]  Airtel — Wrong cancellation of sim

I purchased an airtel sim on 6th jan 2010 and i provided my passport as identity proof and no local address proof was demanded by the retailer.Then on 3rd feb i got a sms from airtel that i would have to goto my nearest airtel relationshipcenter and provide a local address proof.I went to the arc on 4th feb evening filled an annexure E form {relating to local address},on 6th feb iam notified that my sim is cancelled and reason stated was that "NO ADDRESS PROOF PROVIDED"+ "when called the customer-care i was told that i was did not submit the proof in time ".Also i had 100rs talktime on the sim.Some of my freinds had 300+rs talktim when this happened.
Please suggest me what possible steps i can take