Have a look at the guide, you probably just need to add a new line to the box
if it was working in the past, the firmware updates for your box are generally tweeks
which you wouldn't even notice so try a new line before messing about with a re flash.
Menu - Internet - Net Client Config
On sat, sky sports and films won't clear anymore, Bt sports and other channels will
so if you are looking for them it may be a new box and run IPTV instead.