finally looking at canceling.  Finding now I dont use it as much.   twice now been annoyed when part way through watching a movie it disappears.  Seems they remove them time to time.   A while ago had 5 devices. 6 months ago deregistered a couple.  Have updated to Windows 8.1 on HTPC and installed quickflix app.  Lo and behold cant register it.  Too many activations.  On their site it says 5 activations and if you want to another then you need to deactivate one of the others in order to activate the new device.  Doesnt work in practice and you have to ring them after 11am Aussie time.  So decided as I dont use it much and it is now $15 a month, since I have to ring them anyway I may as well cancel.   
 Someone said you can cancel on line.  Looked and under cancel my subscription no option to cancel apart from phone.