Hi Peter,
I looked up your transaction, and it was marked as cancelled. So, no, you shouldn't be charged for it.
Usually, when Amazon can't process a payment, it's because the customer's bank has refused to authorize the transaction. But occasionally, Amazon flags transactions themselves, and based on the error message you got, it sounds like that is what happened. If you want to write Amazon to ask them about why the transaction couldn't be processed, the email address of their Amazon Payments support team is payments-verification@amazon.com.
It may just be easier for you to buy the plugin from one of our dealers though that accepts paypal or another payment method. There are a lot of online dealers that sell our products, and if you already have a favorite, you should check whether they can sell you UltraReverb and process the order instantly electronically. Otherwise, this thread mentions a few dealers that do: http://forum.eventide.com/cs/forums/t/9625.aspx
