They said that it would be looked into. It may take some time but I am certain that everything will turn out right. It's not like your money will just vanish for no reason.
I suggest waiting a few more days. Also, do not pm hampa or an Smod for this. (if you were to pm someone it should be gman80)
If you got that error, no money has been sent. You probably don't have enough money on the card, or you don't have sufficient privileges to shop online with it, or you just entered the wrong credit card info.
We shall not cease from exploration, and the end of all our exploring will be to arrive where we started and know the place for the first time.