Garmin vivoactive4 software update 20th Nov 2024

Following agreeing to todays update my watch face has stopped working

I cannot input or select any icons, only the two A and B buttons work.

I cannot turn the phone off as it seems the screen needs to work in order to do this

any solutions available?

although the watch sensors appear to be be working of sorts, pulse rate working but I played one hour of football this evening and nothing recorded