Reserve Bank Of India [RBI] — To add a complete about whatsapp global company

Last month I have resived an message that my number have won 3, 00, 00, 000INR. An d an representative was sent to India. And he called me and ask me to clear the costume changes. But l was unable to bay it. After few days an email from RBI asking my bank details saying that Watsapp global company representative have given the check to us to transfer to u we need it. And so I given the details to them thrown mail.
After that another email saying that to transfer this amount u need to pay 8500INR . And so I payed it. And I have resived an mail in which my bank details was given. And adding to it you nee to transfer the amount to ur domestic account. And I also did. But finally it ask me an C O T code.( Cost for transfer) for that they asked me to pay 45000INR. I told I can't pay that much and I told my family chuvason and he told me that I have payed half an amount and u need to pay the remaining amount.