Pick n Pay bad service

Good morning

I have a complaint regarding a very bad service I've received from Pick n Pay Protea Glen mall. I got there around 12:30 midday yesterday. I waited in the queue for more than 35 minutes. Upon waiting that long while the cashiers were helping us, one of them whom I forgot to check her name with, she told us she will not serve us. She rudely told us that we were waiting in the queue for pensioners and should start a very long queue at the back. What confused me was that why were we told that after such a long time waiting and other people who were not elderly were served. I didn't mind if we were told that the elderly would be served first and since we waited for long we would be allowed to pay at other tills but would not have to queue. She rudely told us that she will not allow us to pay. I asked her even after waiting for so long and she didn't care but continued to tell us that she will not help us. I went out of the store without even buying the items I needed as well and I drove all the way from home needing them but because the treatment I received was not the exceptional service I'm used to. I am very disappointed with the way I was treated, I will now have to go back, waste expensive petrol to go back and buy what I needed. please train your staff to learn how to talk to people and explain to them that they should put a larger board to let people know that the queue is not for people who are not elderly and should wait on another queue