False advertising abd fighting with their clients

I reached out to Pick n Pay on 22 December, still no response. My complaint is that they advertise a "special" of buy 2 boxea of chocolates and get 25% off. Firstly it did not even apply the discount. Then ro make it worse, when I brought it to the ladies' attention, she "fixed it" by saying that it only applies to one of the boxes. If that was the case, the advert would have read: Buy 2 and get 25% off one. Which it did not. The more I told the ldy she is wrong, the more she fought me on it. Basically they advertise falsely and end telling their clients you are the one in the wrong.