Divorce HELP

Hi, I got married in september,2017. We did not informed our parents at the time of marriage but later in february,2018, my and her parents got to know. My parents agreed to this marriage, they live in a different city than new delhi. Now my life has become a living hell because my wife and her parents, different relatives are harassing me since february on different points. They even threatened me to file rape, dowry and other domestic violence cases and I have also lodged 2 complaints in my local police station against her mother and other relatives bu not wife. each day they harass me in different ways, sometimes they come at my home and fight terribly, and most of the times only females come to fight and I get helpless. I tried to reconcile with my wife but after doing all the nuisance still they want me to follow their instruction if I want to continue marriage. I loved her a lot but it's very disappointing for me to see when she acts in accordance with the will of her parents and relatives which has destroyed the institution of marriage. I have been given threats for suicide attempts as well and physical abuse as well. I want to give her divorce but I am not willing to provide them any legal document as they will definitely misuse it. Also to note they don't have any proof that their daughter was married to me except the call recordings or some text messages which i sent. Please help me as I am under constant harassment and they have crossed all the limits for mental cruelty. I only wanted her to be a good, abiding wife as per the islamic sharia but she turned to be the reverse. Please help me. And if you require any additional information, please let me know. Thanks.