Blackmailing

Sir, I married my nephew (minor at the time of marriage Dob is 04 June 2002) my marriage date is 30 june 2018 she left first time in the month of August 2018, due to her health issues and not cooperate for treatment ( irregular periods). She stayed 4 months with her parents up to November 30, 2018. Finally she came to my house on Dec1,2018 after a long discussion with my sister and brother in law in the presence of my relatives. I argued with them why did not say about her health before marriage and even after marriage also. My wife again left from me on April 21,2019 with her mother for unnecessary reason and I went my wife's home on 29 April2019 to bring my wife ,but her parents threaten , blackmailed, sent out me at night time and they hidden my wife also. Her parents blackmailing me to file a false cases I am not understanding their demonds They always say to come their home every weakend, but I have aged parents they living in village for their medical purpose I should go to them to care about my parents health. I refused to come to every weekend Then they do not send my wife to my home my wife also listen to her parents and she completely stopped to communicate with me. I could I proceed to solve my problem legally. Sir please help me...