Hacker News Reader

What? It specifically says that you can, and even tells you how to start the process off.

I told them the same and the answer was:

"I understand your viewpoint, and I regret that you are so disappointed by our company's decision. I wish things could have worked out differently.

Thank you again for taking the time to share your comments with us. Please know that we respect your opinions and value your feedback.

Best regards,

Account Specialist Amazon.com"

Ahh, I see. That wasn't clear from your post. If they've denied you what was clearly promised, as they appear to, then it's charge-back time.