Did Not get salary from Employer. Not releasing me as well.

I was working for one IT Company which is registered under Company act as Private limited. I was working since April 2018. They were paying me only 70% amount of salary till Dec-2018 by saying that they will give me full balance amount once they will get investment. After December, They are not giving me regular salary but just passing me some random amount. I frustrated and I decided to resign from the post. I send a Resignation mail to them in February and They declined my resignation by saying that we will solve this fund issue very soon. my financial situation was going worst day by day. At the end I was not having money even for Transportation for office. They were keep depositing some random small amount. Finally, I decided that I need to take some action and I stopped going to office and had hot argument with CEO/Founder/Directors of the company. Later on They replied to the same resignation mail which I sent them 3 months back in Feb month which They already declined. I sent them my Full and Final Statement with all details. It is 5.36 Lac is due in company towards my salary. Neither the are paying me my pending salary nor releasing me. I asked them to give me post dated cheque and complete all formalities but still they do not want to do that. Same case is applied to other colleague as well.