Forced by CMD to resign after complaint about Mental Harassment by Reporting manager

I am serving notice period in a small private organization "Commtel". I joined in march 2020 and was working dedicatedly on all the project and tasks assigned to me. After 3-4 months of joining I was send to another place as reliever for a month, there I worked at my best. After that I was repeatedly sent to work as reliever for months and till my resignation I was only working as reliever on multiple locations. While working as reliever my RM taken me granted because I never said no to any of his tasks assigned. Later on he started assigning me work on late nights, calling on late nights, long travelling, night travelling and day work without rest, no leaves acceptance even on emergencies, threatening of career ruining, false commitment and all. Due to that i was having lot of mental stress. One day after late night working I was going to office early morning and due to improper sleep I got vertigo and fell from bike and got accident. By that I was on bed rest for weeks. After my accident I complained about behavior of my RM and mental harassment done by my RM to my company's HR and CMD and requested them for change of RM. I also informed them that I can take legal action on my RM due to his harassment. That day HR called and assured me to do some thing at this matter. And asked me not to take any legal action and take rest until recovery. After recovery I can rejoin my services and she will find best solution for my problem. After 6 weeks I was ready to rejoin my services so I informed about it to my HR and then instead of giving solution my problem HR told me to find another job. It was very shocking information for me. Later I called CMD of my Company about this, and he told me to resign or else he will terminate me. It was also a big shock for me. I was frightened by the word termination because I thought termination will bring hurdles in my future growth and told my CMD not to terminate me and I accepted his resignation offer. And I was not in condition to share this to my family. I was already mentally harassed by my RM and then My CMD increased the level my stress. Due to fear of termination I resigned in few days as HR was calling me again and again for resigning. Now I am not in good mental condition and not even getting any job offer due to poor performance in interviews due mental stress. Please suggest me what to do, I have all the evidences and call recordings done regarding this matter. I have company laptop with me but my official mail is blocked by RM. My last working day is [deleted]. Thanks Satyendra