Shogun

I have a new OLED55C9PLA and am trying to access the red button service BBC channels, no matter which channel I try be it on Freeview or Freesat I keep getting a 'This function is unavailable message' Can anyone suggest a way to access this service please? The tv is not and will not be connected to the internet but that should not be needed anyway. The latest software is installed but the Red Button service did not work with the installed software when delivered. Any help appreciated.