My management is not providing my pay & performance bonus neither allowing me to work.

Hello I joined an american company in Sept 2017, I worked for them around 5 months, I was working and in Jan month I started observing that they are looking for candidate of my similar profile, as earlier they hired me for very crucial operational work in a handsome salary, & when I setup everything for company then they may be observed that now they can get my work done from a lower salary candidate with less salary, and I saw the job posting of my similar profile on leading job portal, and afterward within 20 day their behavior got worst, they started behaving rude & unprofessional over our important business calls,so I resigned with that company, they accepted it, but they want me to leave the job immediately without serving the notice period, as per their policy notice period is of three months if candidate resigned,now they are not even paying my salary for the three month notice period nor letting me serve my notice period as per the company law, They are also not giving my performance bonus.Please help, I want to file a complaint against them in labor court.