Horrible experience at Pick and Pay

Horrible, traumatic customer experience with Pick and pay Northmead Mall, went to the mall after my gym to quickly get chutney, my mask was not steady kept on slipping below my nose, and when I approached the teller, she rudely said to me put back your mask, I was shocked and I had my purse in my hand retrieving smart shopper card, I asked the teller to proceed so long, there was a glass separating us, she said she will not help me took my groceries threw it to the other side of the till and ask for another customer whilst standing there, she asked me to leave. Shocked I asked for the manager who did not even bother to get to understand what was the issue he said to me, I was asked nicely and I was like but you were not here and the lady spoke to me in Zulu, he insisted I was asked nicely, I moved to another teller to pay my grocery, when I was home I needed the name of the manager as I was shocked how he handle the situation it was not normal, I just couldn't understand, I called the shop to get the name and he insisted they asked me nicely, the name of the manager is Paul, the same Paul that I bought a cake in June and it was so terrible, he said to me people love his cakes I am the only one who have problem. When I called the store the following day the store manager who was available said he does not know who is Paul, I have it in writing him denying there is anyone called Paul in the shop. So they are hiding Paul? Why?