Device stuck, did soft restart, now stuck on green triangle. What to do?

My Garmin Fenix 6 Pro was stuck on 16:08 yesterday. It was unresponsive to button presses. Northing out of the ordinary has happened with the watch recently, was just chilling in the lounge when I noticed it wasn't responding.

I searched to find that holding the top left "light" button would perform a soft reset. This worked, the screen when off. I restarted it with the same button. It showed a green triangle on screen. I left the watch on charge.

The watch _still_ has the green triangle this morning. I've performed another soft restart to no avail. I've also tried Garmin Express to see if it can recognise the watch but that doesn't even detect the watch.

I'm unsure of what to do now. I'm also unsure of how I actually contact a Garmin representive to respolve this.

The watch is 6 months old.