Customers shower is clogged and not draining. Attempted to snake drain via overflow several times and was unable to clear the clog. Performed camera inspection via roof vent and was able to see any obstructions. This leads me to be believe that the issue is a failed P trap of drain located under the bathtub before the drain ties into the vent. Recommended removal of bathtub enclosure and jackhammering concrete in order to remove the old drain for the tub and install a new drain current waste and overflow is also install incorrectly