Optrica Technology — blackmailing me optrica technology

Address:	Srikakulam, 532401
Website:	Optrica technology

I joined in online captcha entry job named optrica technology. They collected my signature and copy of voter id. When i started my work i realised that the report was totally wrong. When i complained on it, i got no response. The contract period was over.
Now they are threatening me that the company will file a case for not completing the work on time. They are asking me to deposit 50000 to ignore the consequences.
I recently learnt that it is a fraud and cheating company.
Please help me with this issue.
Thanking you,