SANRAL makes it difficult to use etag

Sanral requires new credit card details but neither the link on their letter nor the website works, so I cant log in to update. I tried the email address provided but the adress is a link to the website that doesn't work. When I called the call centre the lady was unsympathetic and told me to drive to the call centre to register the new card. Really?!!? This is not the first time they have made it unbelievably difficult for me.