treated unfairly

When to link pharmacy in rock cottage to buy bio plus as i forgot to buy it in the store i work in. Got there saw 500ml priced R60 when i get there its scanning R108. Asked the lady helping she said they came in today they wrong priced. You pay what you see but not at link. Or was it because im black? Fine i took the 200ml which was priced R60 but when they scan it that lady said i should pay R70, seriously? Why was i humuliated like that? Its not my problem that the price was wrong. I was gonna pay R60 for the 200ml not R70. Ill never set foot in that store again.