[quote name='crunchberries']Something sounds fishy here. Collections isn't called just because of a failed transaction; they're usually called if an account is delinquent for a while and after at least one notice of said delinquency.[/QUOTE]
This. mrkool889 might be targeted in a phishing scheme. Just to be safe, change your password on Amazon, the password of the email address you received the notice in, and if possible, the email address provided to Amazon.
Normally I'd say ignore this stuff, but if the email you got mentions specific details about your transaction, the phishers might have your passwords, too. I don't know if it's possible to see any damning information on Amazon's user control interface such as credit card numbers, so see if it's possible to pull that sort of information off of the site. I think it just shows stuff like ####-####-####-1234, though. If you can pull off damning information, though, you may be at risk for identity theft, as awful as that is to say. But that's a worst case scenario. I don't even know if the email you got gives any specific details.