GORDON ROAD KFC DRIVE THROUGH POOR SERVICE

I have been buying zinger boxmaster meal from this Kfc drive through & every time, and I mean every time without fail, they always don't have the zinger fillet. I always have to wait 10 to 15 min & when I decide to wait it takes 30 min. What's funny is that when I go to other kfc's they always have the zinger ready at their drive through's. Today I'm just fed-up with this.