Shocking customer service and online experience

I have four contracts with Vodacom. I left my previous network provider because I was promised better network coverage and customer service. While the network coverage is better, the customer service has been extremely disappointing. I am an avid online shopper and chose to do my upgrades online, following Vodacom’s step-by-step process. At no stage was I warned of any risks associated with online upgrades. The problem only came to light when my daughter queried her upgrade eligibility. A check showed her upgrade is only due in November 2031, at which point it became clear that all devices upgraded online had been incorrectly allocated to her number. Since then, I have contacted customer services, the online department and visited Vodacom stores multiple times. Each department either could not assist or redirected me elsewhere. Store staff repeatedly advised me not to use online upgrades, yet no one has been able to correct the error. I later received an upgrade notification and returned to a store, only to find the same issue still unresolved. The consultant laughed and again advised against online upgrades. I was then told to phone head office or physically drive there to meet someone. The number provided simply routed me back to customer services. After being on hold for 15 minutes, I was told the consultant could not help and that a supervisor would call me back. This was at 1pm on a Friday, and I was told it would probably not happen that day. No call was received. I was also advised to return to the store where an upgrade was done two years ago because there was “no recording of the conversation”. I currently have three handset instalments linked to one number, which I was incorrectly told must mean I took out a “double deal”. This is untrue and I have the invoice to prove it. The other numbers each have handset instalments, except for my wife’s number. As it stands, I am paying for five phones but only have four, and this issue has been ongoing for over six months. The only advice given was to upgrade whichever phone becomes available on whichever number, which is not a solution. No accountability has been taken and no apology has been offered. I genuinely regret leaving my previous cellphone network provider.