As you are in the wrong forum, instead of the Vegas forum.
I will keep this thread open until you respond to see if you have checked your account to see if you have been deducted twice and to contact Magix as advised, if it was them you purchased software.
If you really have bought the same version twice, you will have received one confirmation email for each purchase, including links to download the software.
Do those links point to the same place and file? If so, then yes, you have paid twice for the same software.
Contact infoservice@magix immediately for refund.