Star Data Services — They are trying to do fraud with me.

I am Surykant, Few days ago I saw a job opening post on Facebook employee referral page about data entry work and I messaged them for applying. There is one person who's name was Amit from Star data Services gave me his what's app mobile number and I messaged him regarding the job. He said there is data entry work in which you have to fill 1000 forms correctly with 90% accuracy and he also said that, if i will unable to touch 90% accuracy target or if I will not submit work on time then I will have to pay 3100/- Rs. At that time, I think okay that's not a big task I will do it. After that there is a registration process which Amit explain to me. So, in which I have to share my adhar card photo with him and an email ID. After few minutes I got a mail from this company, in which there is a contract type document and there is a option " sign this contract through otp". I read that contract and that was regarding those 3100/- charges and yes at first sight I noticed that the image or contract was fake but at that time I thought it's okay may be some grammatical mistakes there. After submission of otp I got a call about verification in which they said same about the charges and my login id password. After that, On first day, I logged in into there website for start working. I submitted first form and then I selected 2nd form. When I noticed that 2nd form, that was the exact form which was in the pdf file which sent me from Mr. Amit. In this PDF file they gave me example or demo for how start and how to do work. Here my point is, if any company select a particular thing for demo or for example then that thing will never be come into real life live work. Same point I shared with Amit and he said "may be customer data will again come to us for entry as this is a data of this month and that was old data which we shared in pdf". So, my second here is, if a customer repeats itself to your company for entry or for anything then how the data will be exact as the example pdf file ? Exact entry, exact numbers and letters like that example pdf.
I got a clue that they are doing fraud but i continue my work and after saving my 3 forms, I was go to the statistics option to check how much form I was completed. When go to that option, it shows 0 form completed.
As I said earlier I completed 3 forms and saved successfully after that it shows 0 completed forms.
After that I goes to the what's app and send screenshot of this to Mr. Amit, he gave me a helpline number and said to take help from them. I called that numbers many times, everytime they said "we will get back to you soon" or "I will call you in 30 mins" . As I already smell it regarding fraud so I recorded every call of them and I continuosly report this to Amit and all he said is keep calling him. I told Amit that, I will not continue my work as long as this issue will not resolved.
After that day, two days ago I got a call from there so called legal department and that person trying to threaten me about legal actions and that 3100/- money. I only said him that, there was no mistake from my side, your system or software will not accept my completed forms amd show 0 completed forms and I complaint about that to your helpline number but no solution provided from them so this is not my mistake. But as expected, he continues threaten me.
Today onwards, I got a mail from Adv. Patel about this legal actions and all and I noticed one thing, Every lawer should always mentioned his full name in any legal notice but there is only surname.
I am sure they will continue this for some more days but I will not pay anything. If anyone has the solution of this then please help me.