UNFAIR Treatment

I have never felt unfairly treated as a customer by the supervisor at mall at reds I bought a PNP double cream strawberries and cream yoghurt. I took it at the shelve under a price label of 28.99 and when I checked the slip it states 32.99. I went back and spoke to a lady named Anna and she went to check the price and and came back to say there is no label for the product what did I see I went to show her where I got the product she said there is no pricing so I have to get it at the price from the till. So I told her hence there Is no price how am I suppose to know the price of the product she referred me to her superiors called lattie she said I have to pay the till price is it air for a customer to get prices from the till she said no so how are you ladies going to resolve this I ask them the said they do not know there is nothing they can do because there was no price label. I don't know is it because I work in the mall or what because I do not wAnt to bring racial assumptions. I was highly disappointed to an extend I gave the yogurt away