Sdk Services — asked to pay more money

As it was my summer vacation and i had nothing to do so i thought of doing some freelancing and earning some extra pocket money. So i applied to this company and i got a call from one virat saxsena and he said that the company was geniune and it can be trusted and as they provided me with legal bond paper i thought that it is genuine and i said i'm interested
But later when i couldn't find any website of the company i mailed them regarding this and i didn't get and reply
But after a month one manpreet kaur called me and said that i have to pay utility charges and i didn't complete the work as it was my fault i paid the money but even after that they kept calling and were asking for more money and said that they would file a case against me if i won't pay
I qas scared and paid whatever was asked
Again after a month or so i got a call from kapil adhikari saying that i have to pay to close my case
But now i don't know what to do as they are asking me. For more money

This is a mental torture and is effecting my studies and those people know that i'm a student and still they looted me without even thinking about how it'll effect me, idk how can someone be so inhuman i just hope karma hit them so bad that they regret doing such inhuman thing to kids who cry in front of them.

And though i have complained here many times no one is taking such issues seriously