Divorce by consent. How to proceed on it ?

I married on March 2016 by Hindu mythology. Me and my wife is govt job holder . I m in Bihar and she is in Delhi. After elapsing of one month of marriage , she was denying me, any type of physical or sexual relationship. In the later month , she also deny the sex. In the month of nov she alleges me impotent. And despite there or there family support ,I checkup my self and give the report,detailing not any type of impotency. But her as well her family without any giving proper reason regular allege me ,about my impotency. I forced her to give divorce ,to,me if they are not able to listen or at least solve the problem . At initial stage they deny me any type of divorce to me. Now one of her uncle come and called my father ,that she is ready for divorce but whatever be given in marriage should be return. But after that,, there family give not any response,how the agreement will take place . Despite so much educated why she and her family behaving like this