HiFi Corp - did not receive appliances I paid for

I ordered appliances online from HifiCorp on the 27/11/2019. ORDER NUMBER : #*** On the 29/11/2019 i received an email to say my order has been successfully delivered. I emailed the customer care immediately on the 29th and 30th. On monday the 02/12/2019, i further proceeded to get into contact with hificorp as no one rep**** to my numerous emails. I called tge customer care line, after 4 hours I finally got through to the online and tracking department which only to get told they cannot assist me, all they can do is email the manager. On Monday I decided to get into contact with hificorp on Facebook to which they didn’t respond to me but responded to potential customers. I then went to Facebook messenger and finally got a response with “how can we assist you “ after explaining to them how could they assist me. After much back and forth they finally gave me a complaint refrence number. Up until today its just been me phoning and following up with no success. And i only get replies on Facebook messager. Today the 09th of December my order still says successfully delivered even though i do not have it, and no one can tell me when i will be receiving my appliances or where my appliances are currently. The customer service and customer care is so poor. How can a large company not have track of their orders.