Termination of women Mgmt employee under medication

I joined an MNC in Gurgaon in Aug 2016. My manager started harassing me (verbal, s*xual), bullying, intimidating in public & person. I raised this to many higher officials including Director HR. They did not raise a case. Also there is no place where the details of POSH Comittee are listed. In July 2017, I met with an on duty cab accident after which I started to have severe headache, fainting, high blood pressure. Also, due to my managers harassment, I was under psychiatric treatment. I was forced to resign in Oct 2017, which I refused. I was working until November 2017, after which my health deteriorated. I was in constant communication with HR & Sr. Leaders. Office doctor also confirmed that there is no specific recovery time. I wanted to join back but Sr.leaders asked to me take rest. After trying all treatments without relief, I changed to alternate medicine. Doctors said I should not expect more than 80-85%recovery over 6-7years of treatment. Suddenly, in March 2018, I was sent a termination letter without cause. There was no intimation or communication before this was sent. There was no compensation for my medical damages due to accident and harassment. How can I get justice?