No 2for R50.00 street wise two special

I was informed that kfc has the 2for R50.00 street wise two special and when I got to the kfc in strand street I asked them if I could get the special which I got at the one in St Georges mall the previous day the cashier Saturday morning told me no we don't and shouted next please didn't explain why or anything when I told her that I bought it the previous day. I then stood there ordered a street wise two as a single meal I asked a thigh and got a thigh as small as a wing and asked her to exchanged it she said that we don't have anything else I was running late for work took it because I work in boo kaap far from many shops and my shift ended at 3pm so I didn't have a choice but to take the food but im very unhappy about the service because she had a bad attitude and I didn't get the help that I wanted. I will never put my food in that shop again and many people would complain about it but I never knew that it would happen to me.