The double charge that appears on your bank statement is likely an authorization (pending charge) rather than an actual charge.
When you make a payment by credit card for certain services, your credit card company may authorize your card before the actual funds are taken. In this case, the authorization will show up on your bank statement in addition to the actual charge. The authorization should disappear from your bank statement within a month. If you need further clarification or if the charge does not disappear, please feel free to contact our customer service team.