What should I do to collect my salary from a private firm (Star Health) which has not paid me for 4 months?

Hi, I am a doctor and I have worked for a Health Insurance company called ‘Star Health’ as a District Medical Officer (DMO) under Aarogyasri Health Insurance Scheme (a government initiative). My job was on contract basis and I worked from November 2nd, 2009 to March 2nd, 2009. I have not been paid for any of these 4 months and that was the precise reason for my resignation.

Since then, I have been pursuing with the staff about my salary but there has been no response from them. I have also contacted the CEO, an IAS officer but he too did not respond.

I want to know what options do I have to collect my salary from them. Any legal opinion will be greatly appreciated. Thanks.