Incorrect order

I am so disappointed, drove into the McDonald's in Randburg/Bryanston and ordered a Med Cajun Chk but when I got to my desk its Mc Chicken, the box says Cajun chicken. The level of incompetency though..Its the second time visiting the store and did not expect to be back in the office and stuck with a meal I did not order...To prove their incompetency their receipt does not even have a correct contact number.Like really what is ***...I am so annoyed!!!