My current history of dealing with Amazon customer support:
Mon, Aug 08 2016:
Me: "Currently, http://kdk.amazon.com appears to be down. Is there a timeframe for when it will potentially be back up, or has the domain been discontinued?"
Support Rep Α: "I've reported this to our technical team, and they're working on taking care of it. Please try again over the next few hours. Errors like this are usually corrected shortly after they're reported."
Fri, Aug 12 2016:
Me: "It has been four days now. Please excuse my impatience, but are there any updates on the status of this?"