Worked in a fraud company and wanted the salary of my work.

Hello, I was working in a Data Entry Firm located in Dehradun. The nature of job was Online Home Based Data Entry Job. I have been looking for such jobs for quite some time and came across many fake companies. This company did not ask me any registration fees like any other companies did. So I had enrolled for the work. It was a 12 days work of form filling and they said that if the work has an accuracy level of 85% and more then the payment will be done. If it was below 85% the contract would be terminated and the employe has to pay 3500. This was the rule mentioned by them. I agreed and joined the job. After enrolment I found out that the company is not registered in MCA and felt the company is a fraud as they do not have any official website and the only info found about them was a few complaints on Consumer Complaint Forum. Going through the complaints, I found out the way the trap their employes. After the completion of work they say that the work was below 85% accuracy even if it was more and they threaten the employe to pay Rs3500 or they will move legally. Some of the aggrieved people's post showed that a case was filed against them by the company. But the details of the case filed was not convincing as the case number was a 12 digit number and the same case number was found with another complaint given by an employe of another company. Seeing all these I had expected that they would reach out to me also asking for the money. All I want to know is that can they move against me legally as I felt they cant as the company is not registered on MCA and hence such a company is not legalised. In the same can I sue them asking for the salary of my work?