Enduring atrocities of in laws

I am a govt.teacher....i belonged to a poor family...but somhow i did my studies and got the job..after job i got married... after marriage my father in law who is a college lecturer and belongs to a high rated society, tried that i must leave seprate from my family but i oppsed and time passed by...i am sole bread winner of my family...i have to pay my family also which consists three younger brothers and my parents...when time passed by i got a female baby....after 3 years of first baby my wife got pregnant...when she was 3 months pregnant my father in laws persuaded her to come and live near his native home....i oppsed it but he made circumstances very cruical....he tempted her to make a home for her at there...as i have told you that still my financial cindition is not well beause of some debt for my study and my fathers regular sickness and some loss in business...after forcing of my father in laws he sent my brother in law at the place where i lived to bring the goods...i did not object because i had tired that time and i had no stamina to make her undestood....after going there he started to force me to bring all money that needed to purchase a home that was impossible for me...he persuaded my wife to force me...after this torture i came back to my home and tried to convince my wife to cime back...but she didn't come back. Even my in laws threatened me i n this period....when all went wrong i gave an application to district s.p. who forwarded it to mahila police thana for conselling...there nothing good happen....after sometime she gave birth a male child but i was informed after7 days when they came at their home...i went there but nothing happened good...i tried to convince her to come back to home but all was in vain...When my male baby is 5 months old....i sent a legal notice to her to come back home...but she has not replied yet after the legal period...i am in great distress...plz help me...they had ruined my life....should i file a divorce case or in section 9...plz send me ommediate help in terms of your suggestion...i am highly frustrated....