If you receive an email to inform you that your order was unsuccessful and has been cancelled, it is unlikely that any money was transferred from your account. An authorization may have occurred, which is just a temporary hold on the funds, and no money has been transferred. In this scenario the hold will be lifted automatically within 48 hours, however this may take longer to reflect with your issuing bank.
If you have any concerns or questions to whether your card was charged or 'authorized' just let us know.