2018/04/20 - You can re-try your payment in "My Page"
As our payment system has been changed to the transition type for security reason, your "Purchase" and "Payment" become different phases.
It means your order could be completed WITHOUT payment.
Please make sure your payment made or not through "Purchase History" of "My Page",
where you can re-try Payment in case of incomplete payment.
Thank you for your understanding.