Extremely poor service

I am very disappointed with the manager at Pick n Pay Primrose .I was buying groceries and I asked for cash back at the till around 3pm.The tiller said she doesn’t have money and asked other tillers ,they all said they don’t have money .The tiller next to the one I was paying at said she has money but she is keeping it for some customer who will later come to get it .I asked them why are they keeping cash for other people when I am there as a customer as well .They gave me attitude and i asked to see their manager and when she came she told me that they are right if they kept for on other customer who is not even there at that moment .While we were still talking the manager left and said she doesn’t have time for what I was saying.The other tiller who said she doesn’t have the money called me when she saw that it was an issue and turned out she had way more money than what I was asking for .Their customer service is extremely poor .I will never go buy from them ever again unless they apologise for making me feel stupid in their store