I am not a lawyer. But I am also a victim of the same kind of treatment by my husband. He left home last year and has not come back since then. Has fled the country and served a divorce notice on me recently. Ours was a love marriage and we have been married for more than 15 years. I also have 1 daughter.
My heartfelt sympathies with you. Nobody will be able to understnd your pain better than me. I know how painful it is to be abandoned by the one you love.
I suggest you wait for a few days or may be a month atleast. Give him some time to re-think on his decision. He may himself realize that he is wrong and may come back to you. If it doesn't happen (like in my case), then please file for Restitution of Conjugal Rights case against him in the family court. It is nothing but a plea to the court, which shows your genuine interest in bringing back your husband and leading a happy married life with him. They have counselling sessions with you and your husband and it will help him clear his internal conflicts. By doing this, you will also be able to seek maintenance amount from him through the court in future.
But in your case there is a bigger confusion. You said he has another wife and a kid too. Then why do you want such a husband back ? I know it is easier said than done and most indian women like you and me, prefer to stay back in an abusive relationship than to accept the stigma of divorce. But you too need to re-think on your decision about spending the rest of your life with him
If you are still interested in spending your life with him, then avoid filing police case on him. It will only worsen the situation and you may lose him forever. PATIENCE is the only thing you need to keep for few days / months. Don't lose heart, God will show a way out.
Morevover, you have come to the right place here. Experts in the legal field here are very helpful and will surely be able to guide you in the right direction.
Just pray to God and have faith in HIM. May HE re-unite you with your husband soon.