Billing due date is the 9th of every month. The payment amount will be calculated and the payment process will be completed at the very end of the day. If you edit your delivery plan after 10th, the change will be affected by next payment process which will be on the 9th of next month. Also, the payment will occur although the destinations have not been registered or mistaken. Please note that we shall not accept to refund/adjust the balance. We appreciate your understanding.