Refusing to change my bank details

SD GEBHARDT - I changed my bank account from SAVINGS to CHEQUE at the same bank. I visited FNB Irene Village to inform them of the change in bank details where a DEBIT ORDER AUTHORISATION was emailed to me for completion. This was duly done, signed and emailed back to FNB [Email Removed] on 14 July 2015. The change in my bank details was effective from 1 AUGUST 2015. I received an sms requesting a bank statement. I emailed FNB advising that I could not supply a bank statement as the account would only be effective from 1 AUGUST 2015. Even though FNB received the change of bank details 2 WEEKS before my home loan debit order was due, THEY USED THE DETAILS OF THE OLD ACCOUNT ON 1 AUGUST 2015!!! So my debit order was returned. I have never skipped a payment on my home loan since its inception. FNB is adamant they want a statement before the new account details will be authorized even though I forwarded a copy of the authorization form that I signed at ABSA. This is ridiculous! Not even an acknowledgement of an email I sent to [Email Removed] on Friday, 7 August at 0805. BAD SERVICE! No switching for me FOR SURE!!!!