You can manage your personal details in Internet Banking and the Mobile App.
Via Internet Banking, go to the Other Services menu and select Personal Details. Via the Mobile App select Menu and then Personal Details.
For your security you will be asked to complete Authentication. To begin this click View Details, then generate a secure authentication code by clicking on the Send Code to Mobile Number box. This will send the authentication code to your registered mobile number. Enter this code when prompted. Update the details you wish to change and click Update.