Hi simonwalters70,
Thanks for posting!
Sorry to hear you're having trouble with your TV service.
I've checked out your account and I can see an issue with the input signal that feeds your equipment. This is likely what's causing the issues with picture break-up an On Demand.
I've sent you a private message (purple envelope at the top right of your screen) so I can arrange for a technician to take a look for you.
Speak soon! 
Josh