UNPROFESSIONAL WIMPY MANAGER

I had a very bad experience with Wimpy South Africa, one of the waiters gave me a wrong order plus the one I had ordered .the manager then went to my work place demanding that I must pay ,I agreed to pay when I have the money ..but now she is harrasing me even coming to my workplace reporting me to my manager ..what madness is this.Nonesi mall Branch Manager (Queenstown Eastern Cape)is terrible and her managerial skills are pathetic..I want this to be attended to and I demand an apology for being humiliated ..