Rude staff

At the till I told the teller to seperate one of my items for seperate payment. She put it back with the rest. Again I removed and said leave this seperate. She then goes and scans the item. When I told her that was seperate she says well I already scanned it. I then told her but I did tell you and she says no you didn't. I told this lady twice. I then told her it's fine then just give me change for 100 so I can give my mom her change. She ignores me and calls someone to cancel transaction. Where is management ? The tellers are so busy talking that they don't hear you. She has an attitude problem and has no idea how to deal with customers. No thank you no response to my have a good day. Disgusting. This is why I prefer dischem. Staff don't think they're doing you a favour at the till