2 months and still waiting for my phone

My contract expired in December 2017. I waited patiently for the right deal at Vodacom as I was interested in the new Sony. In March, I found the deal that I wanted, which included two Sony phones and a PS4. I went to the Vodashop in The Grove (Pretoria) and signed the documentation. Almost 2 months later and I am still waiting for my items...... According to the consultant, the one phone and PS4 is at the shop, but they cannot hand those over without the other phone, which is on back order. I subsequently agreed to take a new deal with only the one phone and PS4 and went to the shop to redo the paperwork. When I got there the consultant indicated that the PS4's are now on back order and that he cannot give me the PS4 and phone that are already there since they have a different order number. He could not give any indication of when the phone/PS4 will be available. What really gets me is the fact that Vodacom knows that these items are out of stock, yet they are advertised in their booklets every month. I am at the point of cancelling my contract and buying the PS4 and phone cash. Enough is enough. The consultant is trying his best, but his hands are tied. A response from head office would be appreciated.