Marriage problem

Hi, I am 26years old got married on Nov2016 , it was arranged marriage. They had asked for a car and site as dowry and my father had denied it. After marriage From the day 1 my mother in law was dominating on me and my parents for every small things. She used to restrict me like not to sit with my husband when she'll be at home, I should not go to room when my husband s alone during day time. For every small things she always used to say his son this girl is not fulfilling our expectations, you shouldn't have married her you would have waited for better option. My purpose was only to cook for them, do household works and take care of them. She never even allowed me to sleep peacefully for 1night also. On the other side my husband was behaving as if wife for an husband is only to satisfy his sexual needs. He was just using me to experiment whatever he see in d blue films. Me and my husband used to have mild arguments often. One fine day my husband dropped me to my parents place telling she is little disturbed and he never turned back. From that time my parents are trying to talk to them and sort out the things n come to an conclusion, but they never responded. We were waiting to solve n decide something mutually to keep the things smooth as my parents are also aged and they don't wanted to complicate things. But suddenly we have received a lawyer notice recently stating that I was not getting adjusted with them, I used to blackmail them as I'll file case on them n They are calling me from many days but I'm not going n all. Personally I have lost faith in this marriage and have no intention to go back also. I feel divorcing is d best option to lead a peaceful life. Till now I have not taken any legal actions. But after receiving the notice with false statements I'm feeling like I should do something so that they should not play with any other gal like this. Please advice and help me.