I have received a payment reminder for an order that I already paid! Whom can I contact for help?

Please note that we can confirm payments by bank transfer only after three business days of your payment. In this case the payment reminder might have overlapped with your payment. You can then disregard the message.
For other payment methods, please contact our customer service. Please specify your order number, the payment method used, as well as payment details, e.g. account holder, reference, etc. to facilitate the allocation of your payment.