Thank you for your post and welcome to our community forums. We're here to help.
I'm really sorry to hear that this is happening. Would you mind doing a reboot of the box to see if that helps at all? To do this, whilst the box is powered on please unplug it via the mains and leave it unplugged for a few minutes. Plug it back in, allow it to power back up, and check again.
If the issue remains after this, please let us know and confirm which channel appears to be displaying instead. You can find our full channel guide here to confirm.