ABSA is messing with my credit profile

In March 2019 I app**** for a personal loan and the agreement was I will be debited on the last working day of the month. at the end of March the debit order went through on the 1st of April and in June the debit order went through on the 1st of July. on both occasions there was enough money in my bank account. Then ABSA went and updated the credit bureaus saying I was 30 days behind in March and now 90 days behind in June. That did a huge damage to my credit record as now I'm seen like a slow payer while I'm not. I lodged a complain and on the 22 July Mbali Ndlovu the complaint specialist promised me that they have fixed my problem and they have updated the credit bureaus. I have just checked with Transunion and Compuscan and my record still indicate that I was behind with my payments. it seems like my complain is just a joke to ABSA and they are not willing to fix their mess. I worked hard to improve my credit profile and now you are messing my life.