Lack of customer service and customer abuse

I picked up on 18/01/2019 that the debit date was loaded incorrectly. It should display 27th and not 26th. I pinpointed it with the dealer and the lady promised to have it fixed by Absa. The lady from Absa said it will be changed once the account is active, which will be in 2 days time (22/01/2019). She never phoned back and now I find myself making numerous calls with the bank using my resources. And the bank is telling me that this cannot be changed at this stage. Faith is silent as a church mouse. I experienced a very bad service. I want her to fix this debit date to the 27th effective this month. I already foresee Absa debiting on the wrong date and messing my credit record. Please fix this.