Unsatisfied customer

I've been trying to sort out an erroneous upgrade since the 10th of October 2024. Every call centre agent i speak to promises to call me back, however no-one does. I was sent a sms reference number on the 15th October advising that I will receive a response in 3 working days. Clearly Vodacom's working days differ to the rest of the world as I still have not received a call back. Then to top it off, I spoke to Simphiwe a team leader who scheduled a call back for me for the 31st October, only to receive and sms stating that I requested the call back be canceled. I fail to understand why I would cancel a call back if no-one has called me back like the team leader said they would. Vodacoms service socks and it makes it easy for me to choose another service provider. And today their systems are off-line so I can't follow up again.