KFC Bunless all the time

Everytime I go to KFC Lenasia South during the week not even a weekend, there is no buns for a burger,seems like the predictive analysis is calculated wrong,it might be done by a store manager or a system that is not predicting future events or a company that relies completely on historical data,come on guys every week is the same story fix it KFC,other KFC's don't have this issue.