Poor Customer Service

I bought grocery and handed out my bags to the cashier so that she can pack while scanning, she took the bags and place them with the grocery and when she's done scanning she lift her hand expecting me to pay, I asked her who is going pack my grocery she said there are no packers I told her that it is not my problem she has to pack, with an attitude she fold her arms, I didn't give her my card instead I ask her to call the manager, immediately her face changed she was stressed, I insisted to see the manager eventually the manager came and I asked her why do customers have to pack for themselves- she answered by telling me that they had a meeting an hour ago with the staff about this issue telling them that they should pack for the customers she was shocked to learn that cashiers don't do as they are told. The cashier had no choice by then she has to do her job fully. I was annoyed by time wasted reminding someone about her job description