Usys Services — fraud company and cheating people - through fake advocates

Dear sir, i am facing a problem with the usys services. I have done the work what they are assigned to me in stipulated time only. But there were some typing errors in that. So they asked me to pay rs.8500/- as a penalty. I paid it and closed the agreement, also got noc from the company, but now an advocate is calling and saying that your name is not removed from the list and is asking to pay a huge amount for removing the name from the list. He is threatening me, saying that police officers will be coming to my place if the name is not removed from the list.

I have all the proofs for the same. Kindly help me in this