Datalink Infotype — help me get out of this fraud and they return my money...

Recently i had received a cal from unknown number from datalink infotype by a lady and the number is for part time form filling job. Later she sent me a document of soft copy with rules and agreements. On the next day another call from number by another person explained me those rules 2500 forms for 10 days if there are any mistakes in 2250 forms they said i have to pay 5100rs/- to them. When i completed my job n asked for money they started harassing me and asked me to pay penalty money. I was stupid to pay my money
Help me to get back my money n pls take legal actions...