Refusing to pack 3 items in paid for plastic bag

i always shop at PnP. Judy refused to pack my items in a plastic bag, i had to conceal my cash that i withdrew at the check point and needed assistance to pack away my items ( bread, 2 ltr Cool drink, 2 scones) to customer behind me almost smashed my scones on the counter because i was not fast enough. This is how PnP staff portray the image of PnP. I did Purchase the plastic bag at the check point from Judy, Can someone please explain to judy that the customer is king. I shop shop everyday at PnP and intend on continuing. All i want is pleasant shopping experaince .