Hope you can get it sorted, jeni.
The cards that annoy me, especially at work, are the ones which say there wasn't enough postage put on the item of mail. The postie used to come into the office and we'd give him the money out of petty cash, but now the only options are to go to collect the letter from the sorting office and pay up, or stick the appropriate amount in stamps on their card and return it, then they'll deliver the item. Twice when I have done that the card has come straight back to the office, with all the stamps franked!