Datancy Services — Frustration

I was looking for data entry job on online free data entry website and I got a WhatsApp message from Datancy Services saying we saw your profile in online free data entry website are you interested in form filling job.I agreed and started to work online. Condition was I need to fill 500 forms by 5 days they will check the QC level it should be 75% . I have filled 500 forms and submitted and they told QC level is 80%, and asked me to pay Rs 5900/-or else they will send legal notice I don't understand how all 500 forms will have mistakes and I paid 5900 but again their calling me and texted me in 2 mobile numbers like" the case has been generated and case has been registered by which you have to close the legal proceedings starts against you and the legal proceedings cancellation charges is of 10, 000"and texting me continuously saying come to the court this is too frustrating me.