Marital disputes

Hi, I got married on Dec 23 2017and my husband left me in his home and went to US on Dec 29 2017 itself.He promises me that he would call me back within two months but still not.Even before marriage his father started creating issues regarding dowry but still my husband gave hopes that he would be on my side so I had hope on him we got married and consummated it too.After he went to US ,My father in law started his dowry harrasment in many ways I was silent.one time I blasted to my husband because of his torture but still my husband supported his father and said he is 70 years old and you are creating problem.i thought to be silent as he's not believing me and then I stopped telling about his father to him and also his mother is mentally ill as well.i worked in corporate company and after i received us visa i resigned from that.my father in law never happy with the decision of going to US as my family is not rich .one day he locked me in my room and not gave me food for two days and so my father came to pick me up but my father in law has created that my father has beat him up to hide his fault and he is 70 years old and creating sympathy using that and so my husband said he don't want to live with me anymore.I planned to proceed legally against them .My husband stopped taking my Calls and also my brother in law who s not living with us has said wrong about my character as well.kindly help me to proceed legally against them.