Iam unnecessarily being harrassed.....

Sir, I applied to some work-from-home job advertisements in quikr.com. From there a person called me a number of times. I picked up the phone and told me that for some data entry work I can register with their firm, without any joining fee and assured me that after successful completion of the work with >90% accuracy they are going to pay me. The work was, 600 resumes - some 1 page, some 2 pages, 3 pages, 4 pages, etc.. those resumes needed to be filed up in forms provided by them and the entire work with 90% accuracy has to be completed in 7 days... which I could not. From 2 days before, they started sending me SMSes that I need to extend my days or pay penalty. I wrote to them that - okay, extend my time period by 4 days (Whatsapp msg). They sent me WhatsApp msg, that for 2 days-2500/-, 3 days - 3000/-, 4 days - 4000/-, etc., money needs to be paid to their bank account, (they sent me their bank account details also). I denied paying saying that - Employee gets paid by employer.. here the employer is asking money from the employee? How is it ?? The time limit was 16/04/2020 to submit the work, I could not. Today morning they sent me a legal notice that my Aadhar card is with them, they can take legal steps against me, they will send legal notice to my residential address as mentioned in Aadhar, etc., or I need to pay them 6500/-. I even said that - I shall complete the work, submit to you, deduct whatever amount you want and pay me the rest... They refused... saying that I need to pay first... I am a jobless, married man, trying to make some money by work-at-home jobs, and here they are trying to suck money out of my pocket... Please help me...