Airtel Mobile Connection — Outgoing stopped by airtel

Address:

Gautam Buddha Nagar, Uttar Pradesh

I am using my airtel number [protected] for more then 4 years,today balance is Rs.408.65,validity-Jun2011 but my phne's.out going has stopped (Customer care also ) without any information by airtel .At present the reason is announced as in sufficient submission of documents .This is surprising that Airtel has come to point out / find this after more then 4 years, It is very shameful for airtel to give services till date without any enquirer. It is very disappointing for safe and security of communication system ,why there was not a check earlier. Will airtel retun my balance amount?
In addition to this my mobile no [protected] has been taxed twice and there are many more cheatings