Money demand and black mailing

My wife background is a khula person and earning 6l p.a. Rich and holding house and getting rent monthly basis. I come from mid class backgrounds and my wife lived with me for 2 week and deserted me looted my money and home appliances. I paid mehr 50000 during marriage however all in vain. I was deserted from my son and her. She's cheated me by saying that her mother never promised me to give 50 lakhs as a dowry. They are blackmailed by seeking 20000 monthly and not living with me. Tried to poison me and communicated to my family that I took suicide attempt reason best known to them. I am sound and healthy person this kind of person handling my son is not recommended let me know what should I do now I am praying to lord that Allah deal in the matter and show great path to my son and me. My son age 2 nd she's blackmailed by 20000 monthly and I don't know their whereabouts Her dad is bad mouth and trying to make me guilt for no reason However I was married to her it was my first marriage and I married since they said they will lend me hands and give me money 50lakh however they looted my money 8lakh till now I am feeling very depressed for facing this kind of unfaithful people and still wife.