Akt Enterprises — company threatening me through calls, messages and emails mentioning legal action for not completing the work in time.

Address: Aurangabad, Maharashtra, Aurangabad, Maharashtra

My name is sudheer kumar. Last week i was searching for a job regarding work from home and came across an ad posted on quikr of akt enterprises. I applied for the same. Later i got a call from one of their representative and she explained that the job was of typing 7000 captchas in seven days with payment of rs.4 per captcha with 90 percent accuracy and will get salary of rs.28, 000 from which they will deduct their registration amount which was 5100. Later she asked me to sign a contract which asked for my picture, my identity proof and signature. I didn't manually sign my contract.
Later when the day my work was about to begin on 6pm i tried to login but i couldn't when i asked the lady who had explained me about the job, she asked me to talk to the helpline number but when i tried to reach the helpline number their number was off. I tried login several times finally it happened lately. The application was so slow working and slow processing that i couldn't work on it properly because the app used to get closed on it's own. Inspite of doing the work, my captcha wasn't being counted properly the numbers were less than i did and no payment amount was showing. I tried to reach the helpline number but again it was off. So i started with my work the app i received was not working and they told me that my session will start at 6 pm. But the session started after very lately thus one day wasted. And the number of captcha work showing zero and thus no payment made was showing. Then i suspected it as fraud as helpline number was also not working, i searched about this company on internet and found numerous negative feedbacks and complaints so i left their work. Now they are threatening and blackmailing me to pay penalty charges through their calls, messages and emails mentioning legal action. Please help me. I am not in a position to pay any amount. They told me about their work is very easy and will not be any fee for joining. They told me that they will provide every assistance in completing the work and when first salary will come they will deduct their joining fee amount. They did not provide any help in case of difficulty of the work carryout, helpline was not working and now they are demanding money. I am attaching some communication and other details screenshots also. Please help me out of this torture.