Plastic bad service at Boxer Jeppe

So I usually shop at Boxer superstores Jeppe and I always get good service. So today because of this black Monday promotion, I decided to go to Noord and if I don't get the ultra Mel custard, I will go to Jeppe. I was enjoying my shopping even ended up buying things I didn't plan on buying. Everything was messed up when I reached the till. First the cashier didn't greet and I understand because it's probably been a long Monday for her. I have worked as a cashier, so I understand. She finishes scanning my stuff and still hasn't offered me a plastic, here I thought cashiers were famous for PLASTIC! I realized that she won't offer it to me, so I told her ke kopa di plastic. She dials a code and the next she gives me large plastic, without asking me if I want large plastics. And please bear in mind that I bought 3× 2L oil, 6× 1L ultra mel custard, 12× 50G soup and 4× 24 stock cubes (this things are heavy so they require 24 L bag). When I tell her I don't want 38L bag, she gives me attitude and told me I didn't say what plastic I want. This cashier really messed up my good Monday. I guess I will just have to stick to my Boxer Jeppe!