dragonartgallery ,
Hi
Actually Selling manager pro is an advanced selling tool for advanced users who sell on eBay ,its of no use even for new sellers, before subscribing you should have checked ,what exactly you are subscribing, You should not grab anything that is free.
Remember there are no free lunches in this world,
Then you don't check the Internet very often then how dose it matter even though if EBay wanted to inform you about the start of billing cycle.
My advice is sort out the matter with eBay team or livechat,
Regards