I have a Fenix 6 PRO, it won't update

I have had problems with my Fenix 6 PRO since the day I bought it. I have never ever succeeded to update software. 
Now several functions are not working. Version mismatch, update software, 
But It won't let me update, I have tried Garmin express, Garmin connect... IT DOESN´T WORK. 

HATE THIS WATCH.