Request to cancel my contract being ignored.

I called their cancellation department twice this week asking to cancel my contract. On both occasions I've been promised a quote on email which I must present at any of their shops and make a payment so the cancellation can be processed. I HAVE NOT RECEIVED THE MAIL. What else must I do? When I went to the store last week I was told to call the customer care line, when I do that I'm promised a mail with a quote. Their agents are either clueless or lazy. I've been having issues with Vodacom from May 2023. I'll be surprised if anyone does anything about this review because nothing was done last year when I complained on this platform.