Worse experience at pnp

Hello "Hello Peter" I am an extremely upset and unsatunsatisfied customer. I went to pick n pay somerset mall around 1.00 and discovered the chicken they had on special is out of stock one of the staff assured me they would get in later. I came back at 15:25. The chicken was in stock like promised. I made an purchase on my 1st visit and second visit. On my second visit I was standing and waiting at the till and they did not apologise and advise cashiers would be changing and I said to the cashier Kekeletso this is not on as I need a cash back and since she is logging in i'd have to wait. When I asked for the cash back she advised she must ask the supervisor. I said ok I can pick up something i forget to purchase upon running back to the till point I saw the exchange between the cashier and the supervisor whereby she indicated they eont give not make an effort to issue me the cash back service. This is the 1st time in my life where I was said no cash back. They would normally request another cashier to issue the monies or get it from the cash office. They said of the cashier had at 15:40 in the afternoon on a busy day what made me upset was at the kiosk the a few customers were given cash backs while I was in line by the look of way more than the amount I requested. Is this how customers get treated because they deserve a 0 out of 5 stars.