First, carefully read the error message. It may already describe all the actions you need to take.

• Unexpected Error
  This problem may occur due to a lack of internet connection or technical issues on the website itself. In this case, you can return to the search using the button Find another flight.

• No Seats Available at the Fare
  Most likely, during the ticket booking process, seats corresponding to the selected parameters ran out. In this case, proceed to a new search using the button Find another flight.

• Ticket Booking Error
  In this case, we advise you to wait and not attempt to buy a ticket on our or another website until our Customer Care Service contacts you. Specialists will receive a notification about your error and will advise you on further actions.

• An error occurred during payment
  Try refreshing the page using the button Refresh. The order might have been successfully paid for — in this case, the page will load after refreshing. If nothing happens, please wait until our Customer Care Service contacts you.  

• Service Not Paid
  In this case, funds are not debited from your card. The text indicates possible reasons for the error. You can return to filling in the data using the corresponding button.

• Ticket Payment Error
  If this error occurs, please check if you have sufficient funds on your card. If you chose to pay by card through the airline during the payment stage — it is likely that this action is not possible for that specific card. In this case, you can try again by clicking Pay via Kupibilet or return to the data entry stage using the button Pay with another card.