Dv act and 498a case

Since beginning of marriage 2005 quarrel started after great difficulty took her separately.. my wife deserted me in Aug 2014 .. I have 3 childrens 2 daughter stayed till Nov 2015 1 son initial stage she took away alongwith her later on she took away my daughters too.. She has got an extra marital affairs with her brotherin law before my marriage both were lovers after my marriage he was made to marry her younger sister itself and my wife frequently started going on and on.. later on went to commissioner office and through station officers declared and took written confirmation and statements that she wont go nor parents also accepted the same but after birth of my son.2010. She went again i gave talaak for 3 times in 2015... Later she went and file D.v and 498a, maintenance and mental cruelty.. in my absence, she won the case Order passed and Judgment been made. Am paying maintenance Rs.6k per month as 2lac 50 amt need to be paid..I was not allowed nor informed any court appearance date during case by my lawyer, as he joined his hands with opposite party and i was declared as ex parte and defeated... Hence plz advice or suggest which detective agency would be best for me in Bangalore.. as there are lot fraud agency unable to find right one..I beg of you.. suffering and kept waiting for children's to come back without marriage, but no one is helping... am confused and lost all my battles of life give me a good detective agent... I will remember u in my whole life time