If you have a dispute with the site (such as you didn't receive the product), you need to contact the store/site owner. Start with the order-confirmation email you received when you made the purchase. Also use the site's "contact-us" page.
If you can't reach them, then also contact their hosting service.
You might find http://www.domaintools.com or http://who.godaddy.com to be useful for looking up additional contact information, using the website address for the store you purchased from.
If you used a credit card and feel that you have been ripped off, we would suggest that you contact your credit card company/bank and request a chargeback (refund) for not getting your merchandise. They'll go back to the seller and that'll get the seller's attention.
If you think they have committed fraud, then you should also report the site to your local authorities.
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Remember: Any code suggestions you see here are merely suggestions. You assume full responsibility for your use of any such suggestions, including any impact ANY alterations you make to your site may have on your PCI compliance.
Furthermore, any advice you see here about PCI matters is merely an opinion, and should not be relied upon as "official". Official PCI information should be obtained from the PCI Security Council directly or from one of their authorized Assessors.
