Disgusting attitude of cashier at Ackermans Carnival Mall, Brakpan

I went to Ackermans at Carnival Mall in Brakpan on the 28th of May 2018 at about 17:10pm, there were four people behind the counter, two of them were folding clothes and the other two were cashiers. Initially we were three people in the queue but the queue became longer as three more people came to join the queue, I then made a comment to the lady standing in front of me about how the queue was getting longer and yet only two tills were open and it is month end. Then one of the two cashiers(Gabi) heard me and after assisting the customer who was paying, left her till and started helping the guy standing next to her to fold the items of clothing that he had been folding all along, I went up to her and asked her why she was doing that when the queue was clearly very long, and she just laughed at me and asked the guy next to her to look at me and they both laughed. I then walked out and decided not to continue with my purchase. I know my complaint might seem minor but I just want Ackermans to improve the customer s****s of their employees and to warn them that jobs are scarce and they should not take their jobs for granted, by the way, I was very polite while talking to Gabi(the cashier) and at no point did I raise my voice, I actually asked her why she was treating customers in such a bad way.