Robert... working for a bank and being around representatives that take fraud/dispute calls, I can tell you, one the questions is "Did you receive the goods?" They do not ask if the goods were sent or anything. If you did not receive them, that is were you can dispute the charge through your card carrier. If you had received them, and were unhappy, your card carrier would not be able to help you out and would direct you to the merchant. There is a Regulation E, I think, that covers the disputes, might want to look into some of that, should be one that supports merchant transactions.
I know, with my employer, you would be able to call, place dispute, mail, or even fax a letter to a unit, and have a provisional credit given, depending on the amount of the purchase. It will stay there until the results of the investigation which I can think, for purchases against the visa/mastercard, could take up to 90 or 120 days. Call to customer service could take up to 30 minutes, always depends on who you get, get worse folks, and transferred a lot, then longer. So, I know your charge for your time.. but I think you'd agree this some good info for your thread.