The most obvious thing is to ask what the faults team said when you called them?
However - the status page in my part of the world seems to suggest that OnDemand is basically broken here - "you may experience numerous error codes when using OnDemand" with a fix date currently 5 days out. There's a few other posts on here reporting the same error, and Sky-HD OD content does seem to be the worst affected.
So it's probably a network-fault, but to be sure you're best off calling into CS.
I'm really sorry to learn about the problems you're experiencing with your TV service lately, I've not been able to locate your account to take a closer look at this from our end for you unfortunately.
So I'm able to see if we're experiencing any issues in your area or if we're detecting any errors with your individual set top box, could you respond to the private message I've sent with the requested information
You can view the message by clicking the envelope on the top right of this page.
Craig, is this a regional issue as best you know? I get the impression that this has now progressed beyond a "fault" situation and the fix-time is now permanently a few days out. Just seems that once a particular Sky OD asset is affected, then it's not likely to be available for weeks on end.
I appreciate the HD-charge is primarily to access the HD channels, but it does grate with the OD content being so sporadic at the moment.
What annoys me is the area fault here, was apparently solved on Friday afternoon. There are so many Sky-HD-OD programs not working, that I find "missing individual programs" to be a generous explanation at best.