Pv Solution — Getting calls again

In 2019, I had applied for part time jobs in quickr, and a person named fareen from PV Solutions called me and offered me a part time job of filling 1000 forms in 10 days, she asked for my identity proof so i sent my aadhar card and a photo of my signature, within 10 days i completed the task given to me and in quality check they said accuracy did not reach 90%, after that an advocate of PV solutions called me and said as a penalty i should pay Rs. 5200 within 12PM of that day, I paid it within the given time, on the same day around 2PM another advocate of PV solutions called me and demanded for nearly Rs. 18000, I clearly denied it and never received their calls, they had sent a legal notice i did not respond. now almost 3 years later the same advocate from PV solutions started threatening me again. I kindly request the forum to take actions towards this. it's very difficult for a student to deal with this kind of mental harassment.