[Resolved]  STM — blackmailing for money and threatening me with the name of court and legal actions

This is kritika, i have applied for a work from home job and a call from stm company. They offer job and tell that there is no initial payment should be done but after the work completed, 4500/- should be deducted from your salary. After the work complete they provided my qc report is fail. And i have to pay 4500/-. I didn't paid that amount bcoz i got to know that company is already fake. But they are calling me again and again... And asking me that if i want to cancel the agreement then i have to pay 7500 rupess otherwise they will take legal action against me. Please help me to solve this problems