Kd Technology — Harassing and blackmail

I have registered with Kd company for data filling job,
Due to some problems I had failed to submit the forms, they called me and pay 5200 other we will file a case against you
So I paid 5420
Later after one month they called me again and pay 7500
Then I was afraid and again paid 5200
After paid this amount they sent a agreement canceled letter and still they are killing me
And every month they are calling and harassing me to pay money
Please help me sir
Please save me from this fake and fraud company