Please see the Cancellation conditions quoted here https://www.vegascreativesoftware.info/us/forum/vegas-pro-365--124877/#ca777081

Basically, to cancel the contact please send an email stating your customer/order number to infoservice@magix.net

@FarisM12

Note to 365 subscribers: If you choose a 365 (subscription) option, be sure to also click and read Purchasing details under "Buy now".