Wrong pricing

I was at that branch wanted to buy an oil, the that was there it was R44.99/5 and when I got to the checkout the price was R401.99)5, the cashier just said that it's wrong pricing and there's nothing that could be done, I requested that they give me with the price I saw because I was ready to pay that price, the supervisor came and she was rude shouting saying customers takes products on the shelves and put the where they don't belong, to my suprise the were two bottles of the same oil at the same place, then she left me there then the manager came and said the same story, they were not helpful at all and I'm wondering if they deliberately are deceiving customer or someone is not doing they're job.im really disappointed with this service I've never ever had a problem with them. This happened at festival mall branch