Checkers King Williams Town

This afternoon around 12:45 at Checkers in King Williams Town I wanted to buy a mayonnaise the squeeze one for 29.99. I went to the till to pay assisted by a colored name, the cashiers there do not were name tags but she has no hairline black hair, chubby. Big lips. I asked her for a cash back for a R100 she told me that they only start giving cash back when you buy for R50. That is absolutely not true because few days ago I bought fish valued for R18 and still got cash back. This is absolutely unacceptable because we travel during our lunch hour, queue and waste our time