Cancellation of marriage and legal issue

Hi. I got engaged in the month of March 2021 without any problems. All was going fine until the groom broke promise regarding malgasutra. So i was upset tat he broke my trust, since i couldn't respond him properly he was forcing me to cancel the marriage wch i din do. I thght to sort it off after marriage. Our marriage was fixed in the month of may, due to corona pandemic we wanted to postponed the marriage as lockdown was implemented, agn he was torturing if i postpone he would cancel the marriage. Due to his threatening mind i din wan to marry him and also informed the same to him. He strted to threaten me if i don marry him he would file a cheating case. So i also logged a online complaint and there he have told he will speak to elders and sort it off without any issues along with his lawyer and then after a week he have sent a lawyer notice asking for compensation along with a false statement that i have been engaged 3times n have cancelled the marriage. Pl suggest what should be done to get reveal from him n his threatening relative