Builders Warehouse - Wet floors

I went to buy a light-timer, as I came out of Builders watehouse in Parow Valley, I slipped and fell very hard. The floor is very wet because of the rain, there is no boards warning you about slippery floors, and kthere is no carpet or card boards or anything to walk on.
Nobody assist me, nobody ask me if I'm hurt. They were just calling someone to mop the wet floor.
Pathetic customer service.
My left wrist is all bruised and sore.