TWO YEAR Vodacom Dispute!

I've had a major issue with Vodacom for more than two years now. I had a Fibre account with them that I tried to close but they told me it's cheaper to just let it run out so I did that. They kept charging me for it for another year and after a lengthy dispute, they eventually closed my account and paid me back just over R200 after realising their mistake. This said account is still on my profile with the credit bureaus, saying that I'm in arrears with Vodacom since 2021. I've lost count of how many people from Vodacom have apologised to me and assured me that they will personally take care of it. The latest being a few months ago, when they sent me a paid-up-letter which is inaccurate because a paid-up-letter states that I owed them and only just paid them, when in fact I never actually owed them in the first place. This has been seriously damaging to me and my business. All I've asked was for them to fix this with the bureaus and state that all those months in years in arrears, never actually existed and to clear my name from it. I haven't been able to get credit for two years because nobody at Vodacom cares to rectify their ***** up. I've even called to try and pay whatever amount they said I owed but on Vodacom's system, there's no account. I don't know what I need to do to make this right but I'm completely out of options.