Hello Ruth,
I realize you're in Australia, and I am from Atlanta, Georgia, USA, which is the reason for the time difference and extended delay.
You want the update for your Via 280 TomTom. I will be happy to do the remote support if you wish. You can download Teamviewer from teamviewer.com and install it. I just need your partner ID and password that Teamviewer gives you and I will diagnose the problem. Make sure your TomTom is connected to your computer via USB cable.
If you want to set up an appointment for me to do remote support, just let me know and I will offer you a time that is convenient for both of us.
As for phone support, because I am deaf, I am unable to make international videophone calls due to my government regulations, so this is the best way or online chat.