Hey @Sucidalveteran
My neighbors had the same issue when trying to update theirs. This is how I helped them resolve it.
I used the Public Mobile app on the phone to update the credit card. First, I waited 24 hours from the last time I tried to update it (PM security feature to protect your account). I then went to the settings on the phone, then applications, then found the Public Mobile app. I then cleared the cache and data. Restarted the phone, signed back in with email and password and proceeded to update the credit card with zero problems. If you're using the iPhone, there is no way to clear the app data or cache so you need to delete the app then restart the phone and download the app again. Then follow steps about trying to change the card.
