You can retry the failed payment for your payment plan by logging into your See Tickets US order history
Once logged in and on your Customer Dashboard, you may see a yellow banner with a link to retry your failed payment.
If there is no yellow banner, click on the blue DETAILS button next to your order that is on a payment plan.
Once on your Order Details page, click the "Reinstate Payment Plan" button or click "Payment Plan Details" and then the retry link will appear in that pop-up. This link will take you to a page where you can pay off any missed payments.