Incorrect lisiting on credit bureau

I cancelled one of my contracts with Vodacom as the contract ran it's course and had no need for me to continue, according to Vodacom on the last montf of the contract there was an of R4.54 outstanding, this amount was loaded on my profile after they loaded the debit order on their end and ended up as showing due, without any nofitication from Vodacom that the amount was due they then proceeded to list me as a bad payer the following month. Worst of all, this I only found out when tryong to purchase a new vehicle as this affected my interest rate offered directly. I then reached out to Vodacom, who sent me from pillar to post requesting that I need to correct this with the credit bureau. Why should I liaise with the credit bureau, wait 20 - 60 days for their error? Surely they have the capability in their collections to investigate this and correct it accordingly? I have two more contracts that are due for upgrades in the next 3 months. Cannot wait to cancel these as well and be done with Vodacom, would not recommend dealing with them at all.