Lost Sky Sports HD

We're on our second 360 box as the first was faulty (couldn't play back recordings until it finally crashed). On that one we never had sky sports HD channels even though we have a subscription. The new box did have the HD channels until a few days ago but they've all gone back to SD and if I try to go to sky sports HD it goes to the ultra hd channel requiring additional subscription. 

I've tried rebooting the box but no change is there anything else I can do?

Thank for reading.