Company lodged false complaint of laptop theft

My company made me work for 16 Hours per day and no leaves on Sundays. They did not pay me salary for one month. My health got affected and i ended up in renal stone and fatty liver and was not able to work long hours. So I sent a resignation letter to my Manager in email. We had a discussion during which the manager did not agree my resignation. I quit the company next day sending a email that i will not be able to continue. The HR sent me a letter stating that I did not serve notice period. I am removed from the company and i would no longer have any correspondence with the company and other perks/benefits. After 40 days of my exit from the company, the company lodged a complaint that i had stolen the laptop from the company. They have CCTCV cameras, System admin to check assets each day, Laptop trackers and they still lodged this false complaint on me. I was shocked seeing this. I never took anything from the company. In fact they did not pay me my last month Salary. Now How do i proceed.