Automatic rebilling maybe activated for you subscription of BrealWall VPN plans. You can cancel your subscription immediately after you first purchase so there will be no more rebillings.
After you buy, you will receive an email that contains your VPN username and password. It will also contain a link (at an obvious place, with normal font. You won’t miss it) like the following:
https://sites.fastspring.com/breakwall/order/s/GT4120308-2014-73127S
Open that link and you will open a page:
Click “Cancel Subscription” and there will be no more charges.