Unproffesional - SPAR management - The Square

I was shopping at the Spar in The Square. I purchased 2 items that were incorrectly priced. Only When I came to the till point did I actually pick the price discreprency up. The 1st item was Oreo biscuit marked at 3 for R10 and scanned at R5 each. The 2nd item is the snowflake cake flour 2.5kg were the price is marked R23.99 and with a \spar rewards discount R8 off"the big tag is attached to the shelf that has all the products of 2.5kg. When I queried that item only for the cashier to look in the paper and tell me it's marked for the 5kg pack and not the 2.5kg when I go back to the shelf to show them that the spar rewards sign It became such a big issue were I got told this is how we merchandise the store. Then they called the management team who then wants me to follow them around the shop.I do have pics of the item and how it was advertised. The management was rude and arrogant towards me insulting me in front of other customers. I Have never been so abused or embarrassed in public"