Vodacom poor service with cancellations

I have been trying to cancel a data contract with Vodacom for 3 months in a row now. Every time I receive confirmation that this is cancelled, however, I still get invoiced with different excuses every time as to why I am still getting billed. To top it all I downgraded one of my contracts at the same time, starting July 2024. And for some reason they reversed my contract back to the old package and charging more. I logged a dispute through the cancellations department on the 6th of September. Called back in the 9th of September. And to date I am still waiting on confirmation from Vodacom regarding my dispute.