Earlier quoted context omitted.
Heh. My bank did something right, and my yearly $AUS payment to Fastmail finally went through without getting flagged by the automated systems. Alas, a human also saw the transaction, failed to read the note or look in the history and locked the card up anyway.
Fastmail charges you in AUD? Weird, I know it's an Australian company but I paid for service earlier this month and was charged in USD. And I'm not misinterpreting the "$" as a USD-only sign, the invoice literally says "USD".
For what it is worth, Fastmail has been as good as they can be with this issue, but they're at the mercy of my bank as much as I am.