Terrible Customer Service from Makro Springfield

I made an online purchase. One of the items that I ordered was a Nescafe coffee. When the coffee came - it was not the correct one because the picture didnt match what came. I took the coffee back to Makro Springfield. The customer care gave me a credit note of R 95 but the coffee was R145. I told them this was incorrect so they sent me to the online side of makro. After wasting two hours - the guy from online said that the system app**** the full senior citizens discount to the coffee only. Apparently it is a system glitch but they could not exchange the coffee. Disgusting service!!!