It was a computerised security alert from the bank regarding my debit card, could I confirm (or not) some transactions. I listened and decided none of the six were indeed mine. In the end I talked to a real person who confirmed my card details had been hacked from some or other site I'd used in the past. Card cancelled, faffety faff.
It didn't add up to much as, fortunately, I have additional verification requirements on my cards. Just a load of mobile phone top-ups, put through after big transactions were declined. Which is probably what alerted the bank. Which is a good job as it's an account I very rarely use. I confirmed I had the card in my possession, I hadn't divulged the PIN or any security details, they refunded. I still felt like a minor criminal.
In fact I've had ten letters confirming it. Yes ten. That's £6 worth of postage for starters. No wonder fuel prices are rocketing if money gets chucked around like this. Am I to expect ten refunds...?