Pro Sol — pro sol data entry fraud/misleading jobs/harassment

On 14th May 2019, I got a call from a Pro Sol operative under the name of Aryan Khan offering me Data Entry Job. They offered 20000 INR for filling 1000 forms within a time duration of 10 days. They asked for my voter id/aadhar card. I sent them my Aadhar Card. Aryan said that they would give me a call to see if I was fit for the job, an interview of sorts, and that I was supposed to to say Yes. I did it.
I was not informed about any liability fee if failed to complete the job within the given time frame. All I was informed that if failed to do the job no payment would be made to which I had agreed.
Upon confirmation they sent me a pdf agreement which contained my digital signature. I did not submit any signature nor I was informed about it. The agreement is itself dated 2018. There was no mention of the agreements and the terms mentioned beforehand.
I started the work but I was skeptical so I googled about the companies and came across tonnes of complaints accusing the Company of fraud/misleading and blackmailing for money. Seeing this I did no further work.
For upcoming 10 days Pro Sol didn't contact me by any means whatsoever.
Now I am getting calls and messages apparently from one Adv. Rakesh Sharma ([protected]). Also I am getting messages under the name HPLEGALD threating me to pay up INR 5200 or I would have to face legal action causing me loss of money and time.Also they threatened me to file a case under section 420 and 406.
Here is the link to the complaints regarding the same:
https://www.consumercomplaints.in/pro-sol-blackmailing-for-money-c2342368
I am a student and can't afford to pay such an amount also I don;t want to get caught up in any legal issues. Please help me resolve this issue.
I am hereby attaching the pitcures concerning the exchange b/w me and the concerned company.
Please respond at the earliest possible.
Thank You.