Csr — csr fraud company

Hello,

I got a call from csr company they have discussed me and tell me do captan work and earn money, so on this time i had tell him you will send details then i will discuss after again call me and let me know about work profile/ profit then i have told him ok.

Then send me agreement and accept letter without my acceptance. Then i have call him tell him i don't want to do this work this time ready ok don't do it, second day i got a call and mail you will pay 5100 rupee then i will send him mail, but they have call me and mail me about legal action. What should I do please let me know.