Mentally harrashment by Employer & Terminated by employer

I was working in a MNC company from Aug-14 but due to my wife health issues i tried to take leave of 2 month but employer rejected so i resigned from the job on june 2016 and after treatment of my wife i again joined the same company on sep 2016.After joining company provide me the job as per my work in another location. After 3 months on jan 2017 my japanese managemnt suddenly change my work into transportation which was very new for me and after some days japanese person started me giving pressure to cut manpower. He is giving me mentally pressure for work and saying every day to leave the job.This is not only for me he always use to do like this to another person also. on 22nd may 2017 , 9 person gives resign to HR in written regarding the same written above. Then he suddenly tells to leave the company and go outside then all person go outside then he called every one and tells that he realised and will never do again. But after one week on 30th of may 2017 one another japanese started abusing a manager and regarding some issues that why he not comes back to company after leaving the company when he calls him. This is not legal his son is admit in hospital and after doing the work from 06:00 am to 06:00 pm he wents to delhi to see his son.But e is saying that is not company problem.and suddenly he gives in written in japanese language about demotion and salary deduction and suddenly all person go outside with him as all know that this will also done with him on some day. After some times all person comes in company he given leave to my manager and tells me to report at headoffice gurgaon from 1st of june 2017 and my manager to report on 5th june for councelling. No one talking with us till 12th june 2017.No work is given to us .After that on the 13th june 2017our HR Manager told to us that all person has given in written that we have suggested them to do like this and our HR manager and Japanese person told us to give resign in written and he will give us our two month salary otherwise he will call police and arrest us.After torture many times we give resign on 14th of june 2017.He accepted to give two month salary which was written in resign letter with company seal and signature.Now Japanese person and HR manger refuses to give salary to us he gives only 13 days salary. He also abuse to me that if i call him for salary he can do any thing with me.Already my japanese person and HR manager terminated 3-4 mangers withouts any legal notice so he thaughts every indian has same nature and no one can do anything . I am very depressed what can i do now please suggest.