Friendly Vs Competent

I have called into the call center many times and spoke to friendly agents to change my debit date, most people would find this to be a simple request but not Telkom. For the past few months I have been battling and wasting time calling and waiting 15 minutes at a time to speak to an agent who promises to fix or escalate this and still I am not being debited. Can someone competent pls get this right, my debit date changed.