Vodacom not honouring Black Friday deals

I ordered a phone online for my son on Black Friday and at that point their were still 99 left in stock (I have a screenshot of this and of my order confirmation as proof). I even received a confirmation e-mail and order number from Vodacom, along with a number to call if you don't hear from them. I have been struggling to get through to this number ********** 4 as they only seem to be open office hours and you wait forever without being put through to an agent. Today I finally got through, only to be told by a very unhelpful agent that they can't help me and I must contact the escalations department. From what I can gather is that someone was supposed to have called me to confirm my order (which they didn't) and now the deal is sold out. Pathetically poor service - that I would not have expected from a company like Vodacom.