Contract cancellation

I went to a Vodacom store in November because my contract had expired and wanted to cancel. I was given a number to call for cancellation, I called the number and got an sms that I had to wait for an email or sms to confirm the cancellation. To date I'm still waiting for that confirmation. I have called Vodacom many times to follow up, in December 2025 when I called I got a consultant who convinced me to rather upgrade to a cheaper package that came with a device but even today I have never received that device. Called many times to rather cancel as I've been receiving very bad service from Vodacom in regards to this incident. I'm soo angry because they keep taking monthly installment for the service i do not have. I don't understand why they are not cancelling my expired contract as I have honoured all payments in the duration of the contract. I used to love Vodacom but now I would never recommend it to anyone. Vodacom cancel my expired contract that's all I'm asking.