Mak Enterprises — fake data entry job and now they are threatening

I got a message on whatsapp about the data entry job. They asked me to pay rs 300 in order to join the job. I have paid the said amount. After that in the name of processing steps they collected my id card copy, photo, signature, email id. I asked them for the legal papers about the company and they replied that i need to download an application, in that application all the information that i required will be there. I downloaded the application and they asked me to upload a photo and a signature. After some time i received an email regarding a legal agreement. I was totally confused at that moment. The agreement says to pay 10000 if i didn't do the work or i failed to achieve 90% accuracy. I felt something wrong about the whole process and i asked them to provide more about company information, they gave the company is in swatantrya sainik colony, aurangabad, maharashtra. I searched for this company on google and i couldn't find any matches. Afterward, i read a few complaints about the same company on the internet regarding the same fake data entry job frauds. Now they are constantly messaging me that they file a case against me send a legal notice. I need help, please help me. I am scared, I don't know what should I do??? please help me, inform me does any one received legal notice ????