Hello, and thank you for choosing JA for your support needs. What is the age of the printer and when did this issue first start?
Ok, you are in AUS. What I would suggest that you do is visit and Office or Electronics Retailer in AUS. There is a product called Magic Bullet to clean the print head. Due to the age of the printer and the result from the recent attempt at doing a head cleaning. This would be your best option outside of buying a new print head.
You can try a Power Clean. But it may return the same error. Not that the print head is dirty, the nozzles may be clogged, Sir or Madam. Magic Bullet would dissolve the issue overnight to soften the congealed ink and a daytime application to further dissolve the inks in the nozzle.
Wait, I have video instruction for you: