Wrong pricing on the shelves

Went to Dischem The Reef and I was buying Zinplex gummies and the shelf the price was R169 and when I got to the till it was R230 . I asked them they charge the price as at the shelf which the cashier also saw. But the manager Lawrence Zulu insisted that mistake they made was mot to place the correct price. The rule is you pay the price that was on the shelf. That service was not pleasant at all. I will not be succumb to such moving along to where I am taken seriously