A seeping problem

I have what is technically called an ensuite bathroom that I've been using as a shoe storage facility. The water pressure was so dire it was pointless using the shower, but I could stack six boxes up to the roof. In December we got a new boiler installed and at the time the plumber had tested the shower pressure in the ensuite.

Two days ago I noticed that one of the plastic shoe boxes was half full of gungy coloured water. The shower head had been dribbling for the last four months. I pulled out all the boxes, the one pictured below was the worst of them: 18 pairs of shoes were water damaged, 10 were so far gone that they were unsalvageable. My £300 pair of suede Christian Louboutins - which are so uncomforable I've worn them three times - were mouldy. Of all my shoes, these are the one pair I wanted to save (£100 per wear is ridiculous, regardless of comfort).

Unfortunately, moving the boxes meant that the water was able to seep into a broken wall tile and within hours the ceiling in the TV room AND the spare room had both developed ugly brown watermarks.

Rob has now blocked off the leaky shower attachment with a special plug. He's going to do an emergency paint job tomorrow night. We have 48 hours to get it looking reasonable as the bank valuer is coming over for another round - the last valuation was so ludicrous we decided not to pursue a mortgage with that particular bank... great timing, but these things never seem to happen at a good time. It really is never ending isn't it?