Pathetic Teljoy Customer Service

I requested Teljoy to change my banking details on 20 Feb 2019. I got confirmation from the Customer Care department that the details had been changed and that from 01 Mar 2019, I would be debited from the new Bank Account. Unfortunately this did not happen. On 01 March 2019, my old bank account was debited and because the account did not have sufficient funds, I incurred charges. I contacted the Customer Care department and was told that this won't happen again and that I need to make an EFT payment into the Teljoy account which I did. Now on 01 April 2019, the same thing has happened again i.e. old bank account debited; more bank charges accrued. I am gatvol of this nonsense and will not be making an EFT payment into Teljoy's account. This is very poor service. I really expected better