Myc — Fraud company

I am harsha 10 days before i got a call from myc company maharastra saying that captcha filling job for salary 30, 000 and they will deduce the amount 6, 900 after salary has credited in. My account. But this is a fraud company i was not aware of that agreement and they made me to enter the code for the agreement and today they have sent me a mail that you should pay money or we will take legal action.. I'm not going to pay any money for this fraud company but i was afraid of legal notice please help me to solve the problem