There may be several reasons why your purchase does not go through on your existing ViaBill account:You are trying to buy for more than your available credit.You have an overdue amount.Your account is closed for purchases (could be due to missing payments, declined payments, suspected identity theft, etc.)You use a different phone number than is registered on your ViaBill account.If you have registered as a customer after the 19th of November 2020 at 15:00 CET your first payment must be done upon purchase. If there is no cover on the card to pay this, the purchase will be rejected.If you still have problems completing a purchase, please contact ViaBill's customer service at support@viabill.com .