Manager antagonises customer after bad attitude

Sunday 1 March 2015 I went to pick & pay to buy electricity and draw money. After purchasing electricity I wanted to draw cash ,the cashier told me there was no cash so I requested to speak to a manager. A lady with the name Joanne came over and asking her why there was no cash she told me if there is no cash there is no cash, laughed at me in my face sarcastically and walked off. I followed her and asked her if she thought it was funny so she gave me the same sarcastic laugh. I then asked to speak to her manager and was pointed to the customer care desk. While I was busy talking to another manager about this matter Joanne came over and laughed in my face again to show her disapproval of me reporting her. I have been shopping at this store since it opened years back, guess what, I will be taking my business somewhere else from now on as I do not take kindly to unprofessional *********** people who call them selves managers. I would not let her manage a toilet if that was my store. This is just one case that is reported, how many just walk out and never come back?