If the order was successful a confirmation email would have been sent to the address provided for the order. If you did not receive a confirmation the order did not go through and any charges appearing on your form of payment are only pending and will fall off in a couple days.
The most likely culprit is that there may be an error stored on your browser. Please clear your browser's history, ensure you have cookies enabled for our site, and then give it another go. Also, if not doing so already, we recommend using Chrome or Safari as your browser. Our site tends to function best with these programs.