Hi. My name is***** you for your question and the opportunity to assist.
I'm not sure how Epson printers act in Australia but in America they tend to store the network settings
and it looks like yours is doing the same. On the printer menu can go you to the setup menu.
Look for an administration item with a submenu item that will restore default settings
or reset settings. I can't find any good documentation on your printer model so I'm unable to be more specific.