Disappointed customer

I had an account with Vodacom for fiber instead I was given LTE data for more than 3 months. I therefore cancelled my contract with them and they sent a notification that it was indeed cancelled. Few months later I received emails from MBD indicating I owe Vodacom, I showed them the proof of my confirmation with Vodacom but they don't consider it. I'm now on credit bureau for something that fixed in May 2022. I will never recommend Vodacom to anyone