I'm glad you were able to get your money. I would urge all head-fi members to use their credit cards for purchases from small suppliers rather than Paypal even if you pay a little more for the privilege. I've worked in the credit card industry for many years. In order to for a supplier to accept visa/mastercard they have to agree to abide by the governing rules. These rules may vary from country to country. In the U.S. if a consumer disputes a charge the supplier has 30 days to respond as to why the charge shouldn't be reversed. If they fail to respond within those 30 days the consumer is immediately refunded the amount in dispute.
If they do respond within 30 days, the credit card company will forward to you the response and ask you for rebuttal. Your rebuttal will then be communicated to the supplier and again they have 30 days to respond. At that point the card provider will determine the facts and make a decesion. It's really rare that they would decide in favor of the supplier if the consumer has made any type of case at all.