Vodacom Failure

I'm at my wit's end regarding my challenge with Vodacom. They continue to ignore me. I attempted to purchase a 400gig LTE contract on the 26th of November 2021. telephonically and via the app, without any success. I have an existing contract that I wanted to upgrade to the new one- Now instead of the staff assisting me in navigating their impossible gauntlet and simply flick a switch and transfer the existing contract to the new one. The staff are unhelpful and are simply incapable of assisting. I have been told that MR Teboho Mofolo (National Services Manager Vodacom South Africa) the buck stops with you and that you are able to remedy the challenges created by your failing systems and people. I kindly request that this matter be addressed favorably?