Nexon Enterprises Aurangabad — fraud & blackmail legally on online work

We recieve a call for free of cost online work, candidate register us on 14th october online on call, after registration same day we checked online that company is fraud and many complaint against it, so immediatly i called person and confirm to cancle registration he didnt reply accuratly, then i mailed him same on next day for canclellation
After three days i got call that you have to pay amount 5000 for cancellation,
I ignore it, after 10 days a lawyer call me and threaten me that settle it down otherwise legal notice sent to you and i recieve mail which i shared, but all dates and detail are fictiousus which written in latter,
Kindly check if advocate is involved in such activity then its a big scam

Legally they are playing
All mails and detail are attached