Charged for wrong Item (Barcode wrong)

Below is a message i have sent to the complaints department 2 weeks ago now and no response. I purchase from Makro for over 5k a month and after after you cant rectify my queries i will take my business elsewhere.

Good Day, I visited your store yesterday and purchased a pack of Gem squash but the item has been marked incorrect. The bar-code for the gem squash actually scanned as a 3 pack of Garlic for almost double the price of Gem squash. This is the second time this has happened the last time I bought a 10 pack of soap but was charged for 2 of 10 the packs and I only found this out after coming home. It will cost me the same amount petrol to return the item as I travel from Hillcrest to Toti because you guys sell fresh produce and the Springfield branch does not. How can i get refunded for these 2 items i only have the receipt for yesterdays purchase.