he/she is using your maybank account to conduct a scam.
he asked another person to bank in to your account from his fake deal.
once the money is in to your account and he called and said that he wanted a refund.
if you transfer to him, end of the day the real person that bank in the money will make a police report with your account number.
then you will be the scammer on paper.
I suggest that you do not transfer that money, go to the police station and make a police report to safeguard yourself.
this RM500 is to stay in the account until the bank or the police can sort it out.
take care
NEED HELP to identify scammer?, Please advise.