How does the law protect consumers from businesses like this?

Online businesses should be held to strict standards, yet this one continues to operate in a highly questionable manner. My experience mirrors the frustrations shared in other reviews—products are advertised as available when they clearly are not, and once payment is made, communication becomes nonexistent. Despite promises to follow up, there’s no feedback. I have requested a refund, but at this point, I have no idea how—or if—this will be resolved. This kind of business practice is simply unacceptable.