Disgraceful inefficient service

I am deeply concerned and disgraced agitated by the level of service given by this bank. I spoke to a call consultant by the name of Mphabiseng on the 4th December and advised her my debit order date needs to be changed from 20th to 30th day each .onto.she told me she could not change and to send an email to bankibgdetails@african bank.co.zo which I did so and no reply. I received an SMs the other day stating I must reply NO if my debit order to be deducted on 19th which I did.I then called in again today Spoke to xolile and he says that no debit order can be changed via email but done telephoincally . I was then put through to Constance at Collections for some unknown reason and she insisted I provide proof of income all of a sudden for this to change. I told her am now self employed and she insisted I send her bank statements showing some type of income. This is ridiculous for a simple debit order dare change. I have a Absa bank personal loan and they changed it without asking for all this. What is happening and why has staff got 3 different versions of process. Appaling .