Just like that, we suddenly understand some peoples’ stern distaste for subscription-based MMOs. A recent bug in the Warhammer Online billing system charged some players its $14.99 monthly fee dozens of times on their monthly due dates. The amount of the overcharge differs from user to user — reports on this forum thread average between $200 and $500. One player, who claimed to be repeatedly charged for a $77.94 six-month subscription, was hit with fees totaling $1013.12.
This is why you should NEVER let a third party pull money from your bank account. They make credit cards for situations just like this!