
You can see the silver/metal ring flush with the wall on the left tap in the photo, but on the right tap the metal ring has unscrewed and is behind the black part leaving the area between the black handle and the wall exposed.
I can't figure out how to get access to re-fasten the silver metal part and have no idea how the tap is supposed to come off (assuming I need to take it off so tha I can re-screw the metal band to it flush against the wall). I've tried just turning the tap with as much force as I can, in both direction, to see if it unscrews, but no luck...
There is a tiny round hole in the black metal casing but I can't see any screw in it.
Any help/advice would be appreciated.
Thank you!