Terrible service and non-responsive

Ordered a 10-seater dining set on 17 Aug '22. On the day, they were awesome in providing info (pre-sales). I received over 50 whatsapp messages on the day. But after I confirmed the order and paid in full (over R22k) they became a lot less responsive. They committed a 6 week delivery time, but only delivered the table 13 weeks later, citing load-shedding and weather as reasons. This is partly understood, but then they needed to confirm chair colours and deliver same. I was promised chairs are quick to deliver. I confirmed 8 x grey and 2 x black chairs. The grey chairs were delivered on 18 November (legs not stained yet) and I was told black chairs were not in stock at the time. So all they need to do to complete my order is deliver 2 black chairs and stain all legs. In the last 18 weeks since, they have not done so, after actually confirming at some stage in February that stock is available. But every time I query, I either get ignored or another promise is made that doesn't get honored. I have kept record of all interactions I had with this company over the last 31 weeks. Excluding unanswered phone calls, I have interacted (or tried to) with them 37 times. During this time, they made 16 commitments that were not delivered on, and on at least 13 occasions I was not responded to at all. I also shared all facts and events with them and gave them an opportunity to respond or dispute before I take the matter further (like posting here and reporting to CGSO). They did neither.