The merchant should be able to tell you what bank the card was and if it was a level 1,2 or 3 card. This means if it was a personal, business or gift/prepaid card. This merchant does not have fraud protection? Most CC processors have fraud filters that will stop a card from being used if I.P. and billing zip do not match or name to name on card. If you are not from Argentina where the card was issued from that should have flagged the purchase right there and held it for the merchant to review. I'm just guessing here cause I see whats going on, but my guess is the Merchant Processor ran the card it was held for review. This is what caused the first cards to be declined. The merchant sent the goods out, then noticed the payment was held. When the merchant when into his processor and clicked process it declined it. Like I said get all the info you can.