If you are receiving a payment error, then chances are that your card or bank may have an issue with processing. Try making the payment again and see if it works. If not, try to pay using Internet Banking service, and it should be done.
If nothing works, send us an email at firstname.lastname@example.org and we will help you out.
Do not worry if you are charged more than once. If we receive multiple payments from you due to any technical error, we will accept only one payment and will refund the rest. Reach out to us at email@example.com and let us know if you're charged more than once.