Outdoor warehouse- John Vorster drive, Centurion

So the raccist card was played today. The Teller Themba made a error and charged me double for my polorised sunglasses- after I picked it up he wanted to refund me back on my Cc- I insisted that the refund should be on cash as I cannot afford to wait for the refund which usually takes 3 days. There was a black lady named Memory also behind the teller, very arrogant I must add, telling me that no refund shall be given to me cash- not introducing herself only shouting from behind. I asked for the manager, where she rep**** that the teller that helped me was the manager...I told her he can not be the Manager as the Manager will not make such mistake and they were not short staffed so there was no reason that the Manager will help behind the counter. She then rep**** to me WHY? BECAUSE HE IS BLACK? I laughed in disbelief - as I cannot even think as to why should she would even think to play that card. While calling the actual Manager on the speaker- she told me I was raccist. Is this really the type of service you deliver to cumstomer? This Outdoor warehouse will not see me again!!