I purchased Vegas using the one-time payment option, but then after purchasing, I realized the Mercalli Suite bundled is actually only a 2 year license. It's not obvious from the ad that it's only a 2 year license, particularly because the full price of the Mercalli Suite is referenced and it's not mentioned clearly in the ad that it's only a 2 year license.
Don't make the same mistake as me if you were expecting a full perpetual license. :(
I've emailed shop@magix.net with the cancellation form and will see if they will accept the cancellation.