Divorce

I have been married for three years now. We started living separately within a month of our wedding as he had inflicted mental torture upon and tried to extort money due to which my mom had to be admitted in the CCU. I had to undergo therapy for depression and anxiety following his mental affliction. He soon left for another country where he stays and began searching for someone else to get married to. (Validated by his profile matrimonial site) He sent a notice stating I should join him or else to pay him money. We already had paid him dowry which he had sought before the wedding. He finally came down to agree for mutual consent divorce but failed to attend the second motion stating he was held up in some legal issues in the country of his residence. I have lost money, confidence and my will to live past three years and just want to get divorce from him. What's the best way to proceed as he says he cannot come down to India now and doesn't know when and that I can't be granted divorce without his physical presence. Please help.