courier boy scam

one day a courier come for me but I haven't ordered anything than the person says that he had already got the payment but for confirmation of the delivery of the. courier he want the otp number that was sent by him on my phone when I tell him my otp my all money debited from my account actually this was not happened with but it was happened in one of friends home I prescribed that never share your otp or any code with any one especially sometimes some people call us and then ask the otp so never tell any private thing to anyone on call....