Astech Technology — blackmailing me

Before few days i had received a call from astech tecnology regarding captha work.They said we will give you training of work and after training you have to fill12000 captha in 12 days. Once you start your work you have to complete this work in 12 days . If you earn nothing in 7 days you id will be terminated. After that send me one mail in this they send one agreement in date was mentioned before one . I try to call them but not received my call. They had not given me any training. So i not start the work even i not open the link send by them. I check from the Google that it is a fraud company . It theartene all people who join them. Now a person call me again and again to pay 8000 rs. He said if inot send money he will go to court .please help me what i can do now. He said me to pay money in favour of astech tecnology, sbi bank, ifs code SBIN0040769