Trying to upgrade and no one wants to help

I have been trying to upgrade my contract since 6 November. I did the upgrade online and received a confirmation via email that my order has been placed. The order was for a Sony smartphone and a PS4. Both were out of stock at the time and I had to wait 6 weeks for them to order it. After 6 weeks only the Sony smartphone arrived which is not what I ordered and was confirmed via email. I have phoned numerous times trying to get it sorted out. They advised me that someone at Vodacom had cancelled my original order and placed 1 for only the Sony Smartphone. This was not done on my request. Every time I phone in trying to get this sorted out I get told that the person that cancelled the original order will phone me back to sort it out. This has still not happened. I have been with Vodacom for 16 years with issues every so often and I am seriously considering cancelling my contract and moving to another provider.