bad cashier

So I went to pick n pay in wonder park to try and buy drinks for Xmas. Then immediately heard for the express till since I had less than ten items. I joined the queue (became the last 1) and immediately behind me another customer stands behind me, when I turn around it was my uncle! So happy to see me he, places his less than ten items in my trolley and says we shall separate the items at the till(pay at different cashiers since each one of us stay in their own homes).we stood in that queue for about 20 minutes or so and it was our turn to go pay.as my uncle was about to take out his ten items out while I wait, the cashier on till number 31 by the name Maboe with bad attitude and an angry look spoke loudly while pointing at the sign for "less than ten items" to say go join another queue! As my uncle was about to explain that we r two separate people and that he is taking out his items she interrupted. A 49 year old man and spoke even louder to say "I don't care", and ordered me to join another queue despite all other customers having saw that I joined the queue, my uncles joined the queue as well. I then left to ask for the manager's office. While my uncle paid for his ten items from the same woman and immediately before I could tell the manager the name of the cashier who did this, he already knew who had done this to me because he asked and pointed towards that lady's till to say is it that lady with an angry face? And I said yes. He then apologised and said that lady was wrong and he immediately assisted me personally. I asked him to reprimand that lady as she was unprofessional. Had I not stood in the queue for 20 minutes I would have left and not bought from pick n pay. The manager by the name skit promised to call in 30 minutes time but as I am typing this message it's already 20:14 yet all this happened at around past 10 am. I don't see myself going back in there especially because she didn't apologise for bad behaviour.beware of maboe!