Cashier's talking while scanning goods nd we are overcharged

I went to Checkers SOP at 4 Amanda Avenue Oakdene. At the cashier's counter the ladies (checkers employees) were talking so loud and the lady serving me kept turning to partake in the conversation. As a result of this not only did I have to wait for my groceries to be scanned but they charged me twice for the packet of lemons. The cashier clearly was concentrating on the conveesation than what she was scanning. I don't have a car I was given a lift to checkers and the driver was in a rush as a result I was only able to check my grocery slip once I got home. It's not the first time I go to that store and the cashier's are talking above their voices. This is totally unprofessional. I am in possession of my receipt