Company harrassing and not giving salary and releiving letter

Hello Sir, I have joined a Multistate credit co op society last year, They have not issued me any offer letter for that they said it is still a start up we will give you later. ( Orally) now after 1 year they said not to come to office suddenly and also they did not give any relieving letter and 2 months salary. ( I was aware of many illegal activities like mis interpretation, intentional mis communication, voilateing promises etc. going on their ) now they ( Director) are absconding to whom I should give complaint for this. also they are harassing me by saying they will lodge a complaint on me saying that I am a fraud and i damaged their business. How can i get out of this Issue? please help me.