If you are attempting to pay for a course and are having trouble with your payment you may have to contact your bank. If your card is valid and you know you are allowed the amount, then it may be your card has been automatically stopped. We are an Australian company and some banks outside of Australia may flag it as an unusual transaction and stop the payment. If you contact your bank and allow the payment, it should be fine when you try again. Let us know and we'll save you a place in the course until the issue is resolved.