Sds Solution — fake company - forcing me to make the payment

I had got a call from this company, Neha on July 2nd'18 and i wanted to earn some money and i thought this is a good chance.I registered & the sent the pan card copy to them.The project was i have to finish the the given 3000 database with in 15 days.I completed the job within 15 days and i even rechecked the forms before the final submission to make sure that my work was accurate.I was saved one pdf copy before submitting the the same.Then i found out that my quality check report got failed which was shocking. Then i saw for reviews on this company and got to know that it is a fake company. Now their legal team have sent me a legal notice that i have to pay 7400/- (Utility charges and legal notice charges).

Please ban the fake companies like this & help me to resolve the issue.