Ken Technology — fraud company blackmailing me to 20700/-

I post a resume in quikr and got a call from them.
This is 10000 typing captchas work in 10 days without any registration fees.
You have to type minimum 9000 captchas from that registration fees of 6900/- will be deducted. If not you have to pay 6900/- to the company.
After that I agreed for the work and they told me to sent me a aadhar card photo and took a selfie and make a signature on that software they sent.
I sent them, after that they sent the agreement which they didn't told me of that.
In that it is of 11 months contract period.
I really don't know the agreement and contract period.
I did the correct work but they told me that I done above 1000 captcha mistakes.
You have to pay 6900/- otherwise we will go legally.
So I paid the money of 6900/- on 3-3-2020.
Again 4-3-2020 this day they again called me asked me to pay about 3 months of work agreement of rupees 20700/- if not they will go legally..
They numbers:[protected]
[protected]
[protected]
So please take the immediate action against these fraud company.
I was from very conservative family and I have a small baby.
So i think i would work from home and they make me blackmailing like this
Please sir i worried about this work that they told me if i not pay the money they will go legally.
Please take me out of this fraud.
Please sir...