If you got the link for the 5600X when clicking on the affiliate link at the end of the article, it is because the 5800X3D deal is not available in your region. Very sorry to hear that, but I can't help. You could try to use a VPN set to a US IP to see that the deal is still live for that region.
One year since its release, the AMD Ryzen 7 5800X3D remains a competitive processor that provides a high level of performance for a great price. The ongoing 27% Amazon discount makes it even more tempting, and the US$325.99 price also brings 90 days of free Amazon Music Unlimited, a deal that only applies to new subscribers.