Incompetency.bad customer service and appalling attitude

i went to KFC hatfield a bought the 2 x zinger wings on special, because i didn't want to wait there i quickly went across the street and came back after 30 min, my daughter went in to collect the order and i waited outside after 10min of her not coming out i went to find out what is the hold up, the Thandeka girl at the counter told me she has told my daughter to wait because as we were not there to collect the order they gave it to some one else with an attitude i must add, and i told her that is not how it works if i pay for something whether i wait inside or out is irrelevant that item is mine if maybe if i just reserved they can hold for a certain period then she said if i want to complain i must call head office or speak to the manager then i said call the manager she didn't when i asked for the 2nd time she slowly went there and said " when you finish" (i know that because ) that is what manager Mixo said when came,rudely Thandeka blamed me for not understanding that they gave my already paid order to someone which by the way is not how it works,this is not the first time i encounter bad service and attitude from this KFC the incompetency and bad customer service is shocking,i can imagine how they treat students if they give such an attitude to a working person remove that girl she does not know how to work with customers.