Vodacom error has impacted my credit records negatively

I'm very disappointed, infact I'm very angry at Vodacom pathetic service. So in Nov 2019 I had requested for a settlement amount for my Vodacom contract ( AccNo: I***) on the 23th of Nov I went to the Vodacom shop and paid the full settlement amount that was quoted to me. Sent through all cancellations documentations on the 25th of Nov. Did a follow up and was told the contract has been cancelled.

My debit date is on the 1st of every month so on the 1st of December I was debited by Vodacom and I assumed it was for Nov fees but to my surprise I was debited again on the 2nd of Jan 2020 of I'm not sure what I was debited for as I had settled the account in Nov. Both debits for Dec and Jan were successfully and I did not reverse any one of them and both were taken on my debit date. Tried calling them early this month with no luck.

So last week when I was checking my credit score on creditscore.com I had noticed my score had dropped this month and when I checked the records Vodacom was the reason for the drop in my credit score as in the records it showed that I had late payment for the month of December for Vodacom account. I don't know where this was coming from because I'm sure the debit was successfully on the 1st of Dec and again on the 2nd of Jan (although this one was not suppose to be taken from my account).

When I called in last week I was told this was a system error and a service request was logged ( Service Request No: ***) to have this rectified and I was told someone will call once it has been resolved. Today is now Monday no one has called or even communicated to me about this matter, I have received no feedback at all when I call the call center no-one is able to assist.

My biggest worry here is this stupid error has impacted my credit records negatively. I have never missed any payments with Vodacom or any other account but now I have a late payment record under my name. All I need now is to be credited for the Jan fees that were taken from my account mistakenly as I had already settled this account in Nov. Secondly I want the false records for Dec in my credit records to be removed and lastly for my score to be retrieved to the same score I had last month if not higher since this account has been settled. I'm in in process of buying an asset and I do not want this to affect my in anywhere.

Can someone please contact me and assist with this matter ASAP: ***