Hi helen-nras,
It sounds like you are trying to add it as a Direct feed, rather than a Standard feed - at this time, most banks do not currently support credit cards for direct feeds, however if you use a Standard connection with your internet banking login, you should be able to connect it as normal. If you go to the Add Account button in the Banking screen and it automatically prompts you to enter the account number, if you select the Back button in the bottom left of that section it should take you back to the Standard feed connection screen where you can enter your bank username and password and connect using that option. This article goes over the process in more detail, but if you have any further questions don't hesitate to either reply in this thread or reach out to our support team at 1800 046 038 and they'll be happy to assist you further.
-Lucas