Price match hidden lie. Poor customer service.

There is an item that is marked for R5 at makro and game has it marked for R15. I requested for the manager to assist me at game gateway to match and beat the price according to their policy but the floor manager was very rude to me and after he had confirmed that the item is sold at R5 in makro he made excuses that the stock is in a makro Branch in a different area. Which doesn’t affect the promise on their policy. He then states that he cannot discount the items for the total quantity that I had brought to the till (40units). He then states that he can only give me the price match for 6. And that I and clearing his stock, there is no condition that limits a customer to a quantity for any purchase and it’s doesn’t state that on the website or store. I have dealt with this before and never had an issue. But it is wrong and poor customer service from game store gateway. I had to pay the full price which was almost triple of what I had to pay if the staff was customer centric and try to contact head office regarding this. The floor manager repeatedly said that he is a retailer and not a wholesaler. I purchased single units which is a pack of 5 because the 200 pack was not available in store. This is absolutely wrong.