Assam Company India — threatening me to pay 5100 rs even I've completed my job

Address:

Hyderabad, Telangana

I was given job of 7000captcha in a week and for which i'll get salary of 28000, accuracy should be 90%.
There app was very slow, inaccurate in counting the sessions and captchas
I've completed more than 7500 captchas in 6days they said payment will be done with in three days
So i thought to wait
After 2days of my job completion, their advocate called me saying you didn't complete your work you have to ₹.5, 100 or else i'll be sued
And then in the maharashtra court i've to pay 5100+3000 i. E ₹.8, 100.

And i said do whatever...