Worst Service in world

I have been working for Standard bank for 3 years, in October I started working in a new company, I called standard bank in November to request my Debit order date to be changed to 21 of every months. The consultant told me its fine they will do the change. then in December they debited my account on the wrong date, I thought maybe its because of the many holidays, then in January it happened again, I then called the bank, apparently there was no request logged from my side and they charged for R110 for failed debit order. I then log another request to change my debit order, the consultant gave me query number ***, after a week I received a voice mail and sms that my query is been resolved. February my debit order goes off on the 15 it fails and they charge me R110 again. I call the bank ask why. they tell me lot of stories that they have changed the date to wrong debit order date and I need to call again once my account is up to date and log another request. they gave another query number promised to return the charges. March The same thing happens. I now do know were to go or who to speak to. my request seems to be impossible to do