Deduction in F&F and experience letter not given

Hello, I was working in a telecom company named xxxxxxxx . I have served 2years. I quite because of my ASM pressure and He insulted me in front of my distributors .before accepting my resignation he said put your claims if any . I have to give acceptance.. I said ok I put and informed him. But he did not discuss on reliving date.. I had put resignation on March 17 2017 . So I thought my reliving with be on 17th April 2017, as I had 1month notice period. I put my claims on 3 April 2017and I called my ASM and said sir I have put claims. And was working till then. But I was shocked when I saw mail from HR and my ASM .. he while approving my resignation has to give reliving date and He without asking me gave reliving date as 31 st march 2017. On 3rd April 2017 he accepted my resignation and gave reliving as 31 st march 2017... I thought that is the rule I guess bcz he is my higher official he 'll b knowing everything. But later they deducted 16,000 rupees from my F&F . Now he is making giving reasons. I 'll pay next Month and stuff. I have evidence too that he said I did my full notice period.. so mistake from his side .. I did not receive my experience letter too.. Did not get my money and experience letter too. Can you suggest anything beneficial to me.,?