Cashier treating like I bought on credit

I went to Cambridge food the one at bree. After standing so long in a que of few people. As I reach the till I hear the customer before saying can I have a plastic the the cashier(Bongiwe),says to him but you were quiet all along then gives him the plastic pack. I took my things out from the basket nd placed them on the till ,she was beeping the item I went to the other side to put my grocery in my shopping bag . As I looked I saw she was also including things that arr not mine. I told her these items are not mine.. she shouts and say how was she supposed to know that.she went on shooting till I told her to stop shouting at me. She denyed shouting me called for assistance for "void".while I was packing I realised some of my item were left on the till.I told her that juice is mine. She then blamed me for the juice not being beeped. Nd she gave unfriendly remarks.I just walked away . As I walked to the door the security couldnt find the first slip with all items .I went back to the cashier to assist cos the slips are not complete since I had to pay separately . She said so "what am I suppose to do" and continued with what she was doing. I had to walk around the shop trying to find help from manager or supervisor. Since I cannot go out without the slip. Then I told I askd the cashier fo reverse the purchase cos I cant go out with these things . .Then pointed me on the other side to do so. So was not bothered by all this trouble that was going on . Which was stated by her negligent . Eventually there came a guy who helped me . To get the slip. After I got the slip bongiwe continue shouting at me.

I am very disappointed with the service. She made me feel like a little child. I really thought Cambridge was starting to get bigger and better. Only to find out tHey treat people like trash.