Mcafee Antivirus Plus — order no [protected]

I receive the antivirus actvation number throuhg speedpost without any CD. But when I go to download active the anti virus the following sentences are written by Mcafee:- Thank You For Purchasing McAfee AntiVirus Plus Formerly known as VirusScan Plus This registration number has already been used to redeem a McAfee product. Please check the registration number and try again. Redeem Your Card: Select the country and language of the product you purchased Enter your card's registration number - - - - I request to return my money immediately.