Unprofessional staff in Arkermans Northgate shopping centre

Bad service received by the Casualty guy and shop assistant lady .I went for shopping in Northgate shopping centre and they told me that they out of stock of carrier bags and ask if I don't have anything that I can put clothes that I bought?,then I asked how can a shop don't have plastics and run out of plastic bags for the customers don't they check if the stock is running low?,then one of the guys told me if I.m not happy I should go and buy elsewhere because there's nothing they can do. I'm really so disappointed, it shows that Arkermans don't train their staff well ,they're rude.