Makro sells expired goods - disgusted with customer service

Makro Amanzimtoti sold me expired goods and when I took it back on Sunday, I was assisted by a manager who didnt even offer an apology. The goods were a 6-pack of cooldrinks and we had opened 3 simultaneously before noticing that it had expired. I took 3 cans back to Makro who after a tedious process refunded my money after waiting in the refunds queue and then having to go into the store and wait in that queue to get my money back. When I commented on the poor customer service and lack of apology, the manager simply said that despite me only bringing back 3 cans, she has refunded 6 cans to me as if she was doing me some kind of favour! I was outraged. Makro sold me expired goods and we could taste that it was expired, if we drank the entire can and got food poisoning it would be all Makro's fault and they didn't have the decency to apologize after I drove all the way there and wasted precious time waiting to get a refund. I am absolutely disgusted. I took pictures of all receipts, credit note and goods.