Sorry to hear things didn't work out for you!
Log into your Family Zone account and in the top right hand corner there is 'subscriptions'. Under this page you will find 'Cancel my subscription'.
If you'd like to offer your feedback, we'd love to hear from you on firstname.lastname@example.org.
This is an unusual issue that we haven't come across before. Are you please able to give us a call on 1300 398 326? Otherwise, you can schedule a callback through our Contact Us.
If I cancel the subscription does the box still work as i have to ethernet cables still plugged and will just leave them there and continue using the internet through the box as I have disabled all the plans in the box anyway so its basically just a passthrough device anyway.
Without an active subscription the box will not filter any content but it will still work as a WiFi access point so you should be fine to leave everything set up the way it is.