Incorrect missed payment listing on credit record

Due to a missed debit, I called into Vodacom and requested that a manual payment be triggered so I can settle the amount due as per debit order. Thereafter, they sent me a payment link via sms and I paid the outstanding amount and I was told my account reflects as up to date. However, come the first week of the month I get a notification from the credit bureau that I missed a payment for that month. I have been trying to call in to have this issue rectified as it is negatively impacting my credit record incorrectly as I made the manual payment. I have called countless times and received now assistance. I'm disappointed with the poor service and will definitely not be renewing my contract with them.