Complaint regarding fake form filling jobs

I got a job offer from remote flex.live today telling you have to complete 1200 pages in 12 days . In salary they will deduct 3900 agreement charges since it’s a free I said okay to create id . Later they asked my photo , adhar and signature.  After reading online reviews about these type of jobs I got to know it’s fake. Then immediately asked them to cancel my registration since they have mentioned I can cancel before 6 pm. I didn’t wanted to create a scenes but I paid 1500 cancellations fees and got the message back stating they have cancelled it. After 3 hours from another I got a message stating a FIR notice in Delhi and all that I have to pay 3900rs and they started sending messages unprofessionally. What are these people up to?