Operating hours vs Actual closing time..

Shoprite Liquor situated at van-der Walt street next to Ga-Rankuwa taxis ,Pretoria CBD,are your operating hours different from the rest of Shoprite's store in SA.Cos everyday by 16:30 the doors are closed we can't buy booze, even when there are no ques inside am not sure if its a branch agreement so that they can leave early to home(what happened to customer service ...Please update the Operating hours board so that we can be clear that you closing at 16:30.