Easy Solution — demanding money and mentally harassing

Sir, i recive a call on (14th feb 2020) from imran he told me he is calling from easy solution, there is captcha filling work, after that i recive a mail about agreement procedure when i open it is all ready submitted again i call and message to that person asking about work but he is not replied me, after 10 days advocate aditya call me and told easy solution company case against me if i will not pay money 8500. Again yesterday same advocate call me and told you have to pay
More money other wise they will case against me. They are mentally harassing, please help me sir.