Otech — I'm being harassed and extorted by advocate

Respected sir/ma'am,
My name is atul kumar singh, i got a call and a lady asked me to do a part time job for captcha filling. After that they told me to send my voter id and email id. After sending my id they sent some links of software to download. She asked to upload my photo and signature in the software and i did as she asked. After that she mailed me an agreement that was looking totally fraud but i didn't understand that time. At the same time, they send an another link of software to start my work. I was told to fill showing captchas 10, 000 in 10 days that i did. On 12th day, an advocate called me and told that i did not complet the given task as per the agreement. I was totally surprised hearing these things and at the same time he started to extort me. He told me pay 5000 rupees immediately. He harassed me and started to blackmailing me.
Sir/ma'am, i paid rs. 5000/= on the same day (20 march, 2019) but still they are continuing to call me and harassing. They are blackmailing me as they have my personal data like id card and all, i'm feeling like depression, sir.
A very gentle request to you, sir/ma'am, please help me, please help me.
Thanking you, please help sir/ma'am.