Very rude and disrespectful cashiers “Go ahead I don’t give a ****”

Just got back from Pic n Pay liquor Kyalami on Main . What a shocking,disrespectful and rude moment from a lady cashier called Jane. So we spent +-20min waiting to pay I don’t know what’s was wrong with the till.We got called to pay to the other side,went there and realised I needed cigarettes I got back and ask for cigarettes rushing,she says “why are you impatient” I responded and said Because i have been waiting to pay for 20” and responded “Can’t you see it’s not my fault,didn’t you see I called the manager cz there’s something wrong with the till” i then responded telling her not to raise her voice at me of which she carried on talking. I told her I am going to report the incident she said “go ahead I don’t give a ****” out loudly