It is easy to update your Credit Card details. To do this, follow the steps below.
Step 1: Login to https://portal.kissmobile.com.au using your email address and password.
Step 2: On the left-hand side, there is a navigation menu. Please select Update Card (#1 on the image below), enter your correct/updated card details (#2 on the image below) then click Update button (#3 on the image below).
We hope this helps. If you need assistance in doing this or have any question, please don't hesitate to contact us.