Awaiting delivery a week after the scheduled date.

I've ordered at Makro with delivery scheduled for 21 and 22 December. Firstly I didnt get the logic of them separating my order like that, where I ordered 5 quantities they divided the items into 2. It's now the 30th to date I haven't received my delivery which was scheduled for 23rd. After several email enquiries with the order number specified, a lady at head office calls to ask me what items have not been delivered...but my email had the necessary information. To date, I still don't have my order. I'm not sure why I still order from Makro cos if it's not one thing it's the other.