Bad Service - Ackermans Randburg Square

Yesterday I went to Ackermans Rand burg Branch to exchange clothes which I bought for my Son and did not fit him. I went at about 16:45 and the Security Guard was not at the Door, so I continued and I chose the new outfits which I was going to exchange with. I was called in by a Cashier (A dark African Lady with Braids) I got into the till and I greeted her in a very respectful manner in Zulu. i went on and tole her that I wanted to exchange and take new items, She the turned around and spoke to the Cashier who was next to her an African guy and said in Sotho, "this thing of exchanges is irritating, I wand people who are going to pay not exchanges.' I still kept quieted and pretended as if I never hears her, and then she went on with and attitude and asked me for a Slip for items to be echanged, I then open the plastic bag which was on the table in front of her and I took it out and I gave it to her. She did not even look at it she just took it and squashed and threw it on the floor and she said "i do not want this thing I want a slip' i said this is the slip and she walked around from the till point to fetch the slip that she threw on the floor and she realized that this was indeed the receipt and she started processing the transaction with an attitude. I do not have problem with that woman but her attitude is not for the people who are are in a Customer services environment. In fact her Supervisor with a Name tag Precious saw the whole incident but did not intervene or try to reprimand her. This experience is very disappointing and I have made up mind that I will never but from that Shop again because of her. Ackermans Randburg branch has to do something about that woman as she does not have respect for Human kind.