Poor delivery service

Since December 2020 I’ve be due for an upgrade and I’ve gone through the process of ordering online. The first time they failed to deliver to me I wasn’t informed so I waited on delivery for over 2 weeks and still nothing. I tried again in January and the same thing happened so I called Vodacom and I was told that they have the wrong primary number on the system. I asked for it to be updated and I sent ram several messages on their website. No one responded to my email or made the changes to my current number. This happened 4 times and today is the 5th time they have failed to deliver my device. If they have my supposed secondary number on my delivery phone I don’t understand why the courier can’t call that number from a different device. After speaking to 4 agents yesterday and asking for delivery today they still put the delivery as failed and did not inform me. Going through this for almost 3 months now is ridiculous and my upgrade period is about to end. I’m getting no help and no one is communicating effectively with me. The entire process has been draining and stressful. Who do I go to for help if no agent will actually assist me to the best of their ability