O Tech Maharashtra — constantly threatening to file legal case

Address: Burhanpur, Madhya Pradesh, 450331

Hello,
I have applied for a home based data entry job at o tech through quicker jobs. I completed the assigned task but after some days i get a call from an advocate saying there has been an internal complaint filed against me for not completing my work correctly and i have to pay 12000 as compensation otherwise they will file a legal case against me.