Incompetence & harassment

I requested to change my bank details at the walk in center in Menlyn Mall March 27th for the debit order to go off from my account April 28th. The change was not processed and the wrong account was debited. I have been contacted by Dane ref number pc-0w64-4ju2a9 in the 29th of April after a hello peter compliant who promised me the bank account has been changed. I cancelled a contract on my second phone 072 number and changed the number to pre-paid. The wrong account was debited again after Dane told me the account details has been changed. I went to the walk in center again on 02/05/2015. Daniel assured me again that a double debit will be done on 28/05/2015. I am being called 2x per day by an automated system and send sms's to make payment arrangements. I HAVE MADE ARRANGEMENTS. Stop calling me please.