The ceramic soap dish and a few surrounding tiles were pulled off the shower wall when someone tried to use the soap dish as a handle. Some of the drywall backing has stuck to the soapdish and tiles. I have had no problems with tiles becoming loose so I don't suspect I have a water problem. Since some of the drywall backing has come off, do I need to repair/replace the wall or can I just readhere the tiles that pulled off. Help!