I have a really old Stall Shower in my basement...I would probably say its close to 13 years old...Now the issue I am having is that the shower head that comes thru the wall is no longer stuck to the wall...I can move the whole head...Can someone tell me what I need to fix this? The piece of metal that is/was glued to the wall is no long stuck to the wall as that moves as well...Anyone have any ideas..? I was thinking of just replacing it since its so old but wanted to try and fix this little issue.

Thanks for Looking