Bad service

Bad service at KFC Sunninghill branch. I ordered 3 zinger burgers but only received 2 and only saw that when I got home because it was a big order and was not only burgers. I even had to tell the waiter about the pops that was missing. This is *****ing and unacceptable, being charged for a burger and not receiving it. Trusting that the order is correct... also advertising for 2 zinger burgers at R60 deal but when I ask about that they say they don't have it?! Why are you false advertising??? They even did this once before for the wicked zinger box meal, saying they don't have it! This branch has bad service!