Csr Brazen Enterprise — i m complaining about fraud agreement and not paying the amount as said after the work done

My brother aged 18 completed his work of 10000 captchas and now he recibed the call that you have not completed the work and you have to pay the penalty amount they threatened him and told to make the payment of 8500
5000 against some fraud agreement and 3500 advocate charges
Advocate name vishal sharma
Company name csr (Brazen enterprise)
They dont even pickup the calls and they do not reply nor they give us the information about how much work the person completed