Cashiers not considerate

I was at PnP Daveyton Mall a few minutes after 18:30 (store closes at 19:00) on Tuesday to get a few things I needed at home. There wasn't a long queue and I quickly got to a till. As I was unpacking, the Cashier asked whether it's cash or card and when I said it's cash she said I should use another till. I went to the other Till to pay, when I had to pay, the speed point cannot tap and I use an Fnb virtual card(which helps earn more eBucks as opposed to using a physical card). I had packed the stuff and was sent to another till, as the Cashier was asking this other Cashier to help me, she just opened her Till and said she's going to cash up. I was wondering whether cashing up while there are still customers waiting to pay is how PnP does things. I then went to the other one who was free, however she also started with assisting one staff member, they took long as she didn't have a smart shopper card. I had to unpack the plastics I packed already and after scanning the items, the Cashier's system took time to cancel the transaction as she had "scan to pay" as my payment method without asking me. I'm used to going to this store as it is on my way when I go home. And I've encountered minor issues and not reviewed but waiting so long after a long day to pay for about 10 items is really not on.