If Reg, the great god of all things electrical and service manually(?) can't get it to you in time, then we may have to rely on the teachings of another great one, Sun Tzu and his seminal Art of War...'cause appliance repair is war. So following Sun Tzu, let's first study the layout of our battlefield ie, the diagram.
What we see is a bezel yet no screws being represented. That's not unusual but it gives us a clue. The next thing we notice is the little squares on the door surrounding the dispenser....I surmise they are holes for clips and if you look at the top right of the bezel, there appears to be little protrusions, possibly clips. Based on this, I imagine this bezel is of the type you pry off found on many GE's
Now if it breaks, I will rely on the lessons of one of history's greatest avoiders...
I used an old plastic prying device I got with an ipod fixing kit to get behind the bezel - it was slightly raised on the upper left side leaving a nice gap big enough to get the thin edge of the plastic tool into.