Hi Rowan - I have removed the 1800 phone number from the payphone as that is not the number to call that phone. 1800 numbers for business etc are usually tagged using the phone:AU tag. There may be a special tag for the operator of a service (in this case the payphone) but its not one I readily know  (maybe phone:operator:AU??). For ease of reading its also OK to add spaces in the numbers but I know this can be difficult in some apps. https://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines/Australian_features#Phone_Numbers

Cheers