Account paid up but MBD did not send info to credit bureaux

This will be the second time I'm writing this in this forum. I had an account with FinChoice which was later handed over to MBD. I settled the account in full and closed it in November 2021. But, alas, I check my credit report and it says same account was in arrears in January and February 2022. How is that possible when the account was paid up and closed, and I even received and still have the paid up letter.

Someone neglected to do their job and submit the necessary documentation to the credit bureaux and now my record is *****ed, because all you guys did after I complained was just close the account. I WANT YOU TO FIX THE WRONG PAYMENT HISTORY; THE ACCOUNT WAS NEVER IN ARREARS. This is reflecting badly on my record and I've been trying to talk to someone at MBD since I found this out in February.

I spoke to someone once who said to speak to a Johanna and gave her number, but sadly, that number just rings once and stops.

What must I do to get the 2 months in arrears removed from all credit bureaux???