Home Contractor cleverly took contract coy from my wife and not retuning back as he did mischief

I am akash dubey,I have given contract to anoop soni SSC construction now MMO construction. He has doen fraud with many people which i came to know later on .I had contract with him on 1550 ruppe.sq feet in Feb 2022 and till today he is not able to complete my house he has given 11 poessission dates and not able to meet.he has used cheap material every where .when i came to knew it was very late as he already took 1.7 cr from me and he has cleverly taken original contract document from my wife was not at home last year as he says sister my wife.from that day i am asking document from him and he ignored every time giving excuses. I kept patience as i also had trust atleast he will not do anything wrong but when i knew and i confronted him then he started threatening. I have done all transactions online to him.I have soft copy aligned between him and me on whatsapp chat and details when i am going to sign contract. I have photos of 4 pages of contract which i took some how earlier. I have all message comunication of 1+ year on whats chat ,poessission date on maiil and whatsapp. I tried to FIR in police and i gave all these proof as well, even I registered in SP office as well but they are not showing any interest .need guide on this.