Goods bought online nearly a month ago and still not received

Bought an item online on the 11 December 2017 and to date it has still not been delivered. Makro blames Dawn Wing and they in turn blame Makro. All I want is the item delivered and in one piece. I have called the online centre, Makro, Dawn Wing and get shoved from pillar to post. I held on the line for 45 minutes for Dawn Wing the other day. I find this completely unacceptable and don't actually know who to call. I have used Facebook messenger and they responded and said the problem had be escalated. That was 3 January and still no response. Neither company returns calls with any feedback whatsoever.