Please open the payment link on only one device, only in one window.
If your payment does not go through and you receive a message stating ‘Payment in progress’, this means the link has already been opened in a different window or on a different device. It is only possible to access the link once. Therefore, if you open it several times or on different devices (e.g. both on your phone and computer), this message will be shown. Please wait 15 minutes and try again. Simply closing the window will not solve the problem since the payment is activated just by opening the link.