Bad self-service site and app

I have app**** for a RSC Credit Card, the application all the way to receiving and activating the card was an ease. The nightmare began when I tried to register for the self-service site. At first it was saying that they are "currently offline", thereafter it jumped to "you exceeded the number of times you can login/register" and then back to "currently offline". I even tried to register on the app but that just goes blank. I have spoken to consultants who just told me to send the screenshots to *** which I have done. This is extremely frustrating as I need the app to do an urgent payment. RCS really needs to develop a new app for their credit card holders!!!! I have still not made my payment as the self-service site and app won't let me register. PLEASE REPORT TO ME URGENTLY.