Attempted to return call, number is disconnected so likely spam call.

Said they were from Visa & Mastercard & wanted authorisation on a transaction for a large amount to "Judy Smith"

spam call i believe

Had a missed call from this number, called it back, and had the message "optus advises that the number you have dialled is incomplete..." so assume it's a scam.

They just called but didn't leave a message.