I was working with a company for more than 4.5 years and even worked in the second shift until 10 PM for about 3.5 years. I had a good performance record in all the annual performance reviews. I had some health issues and was on leave; this was informed to my manager and HR. After I joined back, my company asked me to work in the 8 AM shift, which I did not feel was feasible as I had just recovered. HR asked for a medical certificate stating I am not able to work in the 8 AM shift. My employment letter does not have any clause stating I will work in any shift; still, they blamed me for not being flexible and said this is my last chance. I again felt unwell and went on leave; within one week, HR sent an email saying to respond today, and before I could see the email on the next working day itself, they sent another email saying they have initiated termination. In a few days, I was terminated with no show cause letter received. Now, after 3 months, the company is asking for notice period recovery. I did not resign; I was terminated without any notice, and still, they are asking me for the notice period amount. They have not even provided my experience or relieving letters, which is making it difficult for me to get another job. Can anyone please advise on what I should do in this case?