I am putting a new shower head, hose and bracket. I managed to remove all parts except the bracket that attaches to the nipple. I can’t untwist the bracket. See the photo attached. The bracket is round and a spanner is difficult to grip to try to turn the bracket. It could also be stuck down with something…it should be a straight forward unscrew. Any experienced advice would be very helpful thanks. A plumber is another option.

