My card is showing two transactions, it looks like I was double-charged.

The double charge that you see on your bank statement is most likely an authorization (pending charge), rather than a real charge.

When making a payment by credit card for certain services, your credit card company may authorize your card before the actual funds are taken. If this is the case, the authorization appears on your bank statement in addition to the real charge. The authorization should disappear from your bank statement within a month.

If you need any further clarification, feel free to contact our customer service team.