I want to help my girlfriend who is forced to marry another person by her parents.

I am in a relationship with a girl for 10 months now. For the last 5-6 months we have been talking to our parents about our marriage. My girlfrnds parents refused to accept our love and have now arranged for her marriage to a third person. She was forced to consent by her parents who threatened to commit suicide, if she elopes or tried to marry me. I have chat proofs on social media where she has told me she is not interested in this marriage and does not like the guy to whom she is being forced into a wedding. She has said this as recently as yesterday. She has taken a stance were she is ready to sacrifice for the family and can't risk their lives. She continues to say "I love you" But I'm helpless to me. Her fiance has no idea of our relationship. Her parents have threatened to suicide even if she tells her fiance about our relationship. When I went to her place for peace talks her parents n brother behaved wierdly. They fell at my feet asking me not to damage their honor and same time they were emotionally blackmailing her by saying.. Anyone who elopes will have a hell of a life, if u elope then u ll never see us alive etc. Though unethical.. I had voice recorded this meeting and discussion Is there anything I can do legally to help her and myself? A legal notice or something to put pressure on them to cancel that forced wedding? Or any concrete actions?