Makro Online - worst customer service ever!

I've had the worst experience with Makro online shopping. I bought a perfume online which was on sale in February. The wrong item was delivered and I logged a return/exchange and explicitly stated that they exchange it for the correct one. They took over two weeks to handle my query, I was supposed to have received what I ordered on sale price. While they were still busy with my query, the promotion ended. When they eventually got back to me, they automatically refunded me whereas they were supposed to send the right item I ordered on sale price. I made a call and told them to escalate the matter, again it was poorly handled as they came back to me to tell me that they will refund, instead of rectifying. It was not my fault that they messed up my order and now I've missed out on the sale. As I'm typing this it's been a month now since I logged another call to complain about the issue. Their customer service is very poor and I'm totally appalled