Went to KFC katlehong crossing to purchase an all star meal through drive through

Went to KFC katlehong crossing to purchase an all star meal through drive through. There was no line of cars at the drive through or people. I ordered a stoney with the meal at 13:08 order number 606 and was told not to wait at the drive through window and made to drive further and after a short while a lady approached me to tell me to go park in the parking lot. I had to wait 10 min to get my order of which really defeats the purpose of a drive through. Nonetheless I took my meal and went home only to find that my order wasn't correct as I was given a coke and I had to drive back only to be confronted and told the stoney wasn't in the order but the lady who takes the order had agreed to change the drink as it was her mistake. Can the service given at kfc in affluent suburbs be the one we get in the townships too because there's a huge difference and there shouldn't be.