Vodacom continue to disregard consumer rights

On 5 March 2021 I wrote a review about a complaint that Vodacom has delivered iPhone 12’s to me and my parter when we in fact requested iPhone 12 Pro Max. Vodacom however started our new contracts despite the fact that we have informed them of the mistake. At time of the review we were already awaiting the collection of the unopened phones for 2 weeks. Now 23 March 2021, another 18 days later - the unopened phones are still not collected!!!! This after Vodacom has promised on the 6th of March to resolve the matter, and following a further Email from Vodacom that they will collect the phones and re-issue the correct phones. We are now waiting for 32 days... while Vodacom is taking our money every month, but neglecting to fetch the wrong phones and supplying us with the correct phones . What do we need to do to hold Vodacom accountable for services.