What are the legal options in front of me?

Dear sir / ma'm, I got married in March 2018. My wife was already married and divorced with another person by then. Her previous marriage took place in Oct 2014 and she got divorced in July 2016. We have been online friends since 2006 and I dont know anything / anyone from her life except having a good opinion on her as a person. In fact I first met her only in Sep 2016. After her marriage in 2014, I never had any contact with her and in 2016 March she messaged me in Facebook telling her marriage broke up and she is living separately. The reason she gave for divorce was that the the guy is impotent,unfit for marital relationship and when she brought this issue to his parents' notice, after which all three of them started torturing her. She had to approach court which finally declared the marriage as null & void. I truly believed in what she said, and as a good friend supported her morally making sure she doesn't go into depression. We spoke everyday for almost 1 year by when I decided to marry her. In Feb 2017 I approached her and told I'm ready to marry her if she too likes me. All the while, I never asked her for even the name of her previous husband, inquired about reasons for her divorce with any one else. I just believed what she said as true and went forward with my decision. I convinced my & her parents and we got married in March 2018 and moved to Pune, where I work. After marriage I'm getting to know she lies about sensitive and critical issues very easily on the face and that she is not being completely honest with me. Despite me requesting/cautioning her to be transparent and honest with communication between us to avoid misunderstandings, she continues to defend herself and be dishonest towards me. Not just her, her father also lies to me. If ever I try to make her realize her mistakes and understand importance of transparency and honesty in communication between us, she emotionally blackmails me that she would commit suicide. Thrice she has attempted to commit suicide and I had to break open doors of our bathrooms, bedrooms and ensure she is safe. Third time when she threatened me with suicide attempt, I sent her to her hometown, Chennai, in Jan 2019. We have been staying separately since then. All these eventually eroded the trust I had on her and I started inquiring about her and her family. Shockingly I got to know that she lied to me completely about her previous marriage & divorce as well. I really had to struggle to find name of her earlier husband, get his details and finally spoke to him. I now realize she and her father cheated me completely and continuing to do that even after marriage. After giving it a lot of thought I decided to proceed legally and file for divorce. I request you to help me in understanding what can be done now? Thanks & Regards, Sunny.