Failure to comply with request to change debit ord

on 10 or 11th of March i called into VAF to request my debit order date be changed to the 1st of month, as i will only get paid on the 31st of March due to my resignation from Std bank. i followed up again on the 19th and spoke to two different consultants, each time being placed on hold for 12-15 minutes and being advised that they cannot access my account. Today (being my debit order date) I have spoken to two different consultants again plus another consultant who deals with payment arrangements. this person told me they cannot assist as the i am not in arrears yet. Every time i phone either the person cannot access the account, the system is offline, there is an error message. excuse after excuse! My debit order date has not been changed after requesting it to be done 10 DAYS AGO! Today i am told it cannot be changed, its too late!!! Now this will affect my credit record due to ***********ies by STD BANK! and I WILL BE AFFECTED. My job and career requeres me to have a clean credit record and due to slack systems and *********** staff my career is affected!!