Filing for divorce

I am a govt employee. My engagement cum Nikah took place 3 months ago in an arranged set up and Rukhsati has not taken place yet and the bride is still living with her parents. I was very happy and exited about it untill I started talking to her on phone right from the 2nd day of Nikah. She talked to me in a very rude manner and turned hysterical frequently, with occasionaly using foul language and intimidating me. She told me on the first phone call itself that she is having some mysterious medical condition and she has fainted multiple times during her study period and has consulted leading hospital for the same, she also told me that she is allergic to vaccines giving the example of covid 19 vaccine. She also said that she has a severe chronic cough. I believed her and asked her to WhatsApp me the medical history as I'm myself from a paramedical background as I wished to understand the nature of her ailment, but she denied. It gave me anxiety especially when she claimed to be allergic to vaccines as multiple vaccines are needed during pregnancy. Initially I tried hard to correct her and made her understand the true essence of marriage but she didn't respond positively and instead blamed me in one way or other. After the Nikah we met once on her request to exchange the shoes that we had gifted to her on engagement where she tried to jump off the moving car just because I showed my disapproval on her way of taking to some random guy over phone sitting in car on the first meet who, according to her, was her colleague in a private institute 6 months ago. This along with many such instances made me to think that either she is not happy with the marriage or she is has a violent mentality. We stopped talking to eachother for about 10 days.When I failed to correct things I contacted her father through a mediator and revealed everything to him. He tried to counsel her but this turned her more aggressive. I finally revealed everything to my parents and they told me to end the marriage of she is not happy with it. I told the same to mediator and her she started sending apology texts claiming that she is not willing to end the marriage. Then after, 3 mediation attempts took place where attempts were made to end the Nikah with mutual consent. In the final mediation they demanded to keep all the Mehr and jwellery gifted to her and asked for 5 lakhs rupees to end the Nikah. But the mediators sought to meet again to negotiate the amount. A couple days later they lodged a police complaint against me for false promise of marriage and cheating, breach of trust etc and threatened me with all possible cases in every plateform. What should be done in such a situation? Please guide me as they are aiming huge alimony and are trying to take away my job with the power and money they have.