Cheated and harrased by an MNC in India

I got a job from an government employment exchange. I was interviewed and selected from their and again interviewed in company office by thier HR manager. After clearing all rounds of interview i was asked to pay a bond amount to company that too whose paper was not provided to me. Still i paid and joined the company. I worked for 8 months in thier office and plant as well but was not getting salary regularly not even all authentic credentials from HR department. Still i continued with work as HR manager told one fine day everything will be settled. After 8 months some higher official came from headquarters and stopped me from working and stopped my salary. After some audit they told my recruitment details is not in thier database and its a fraud done by their manager and they terminated me from company as well. If my recruitment was not authentic how came i worked for 8 months with thier core technical team and suddenly started threating me of getting blocked from organisation. I have all the documents and mail's and everything authentic and approved letters from thier headquarters as well. Now i don't know what to do and where to go.. please help..!!