also, if a transaction fails, call the credit card customer service. Companies may flag foreign transactions as possible fraud, and the name funcom, to them means nothing, but sounds su****ious, and I'm sure there's some record of kids using parents credit cards, and the parents reporting it as fraud, increasing the chances of declined charges.
I changed cards, paid for the booster, then a week later my renewal was blocked, I only resolved it by calling the card company customer service.