Hi, I can't refill my prepaid account. I want to use a new credit card but it wan't accept it. I get "Heads up! Only one card can be registered per account.So we'll save the credit card you've registered for future refills". How do I register the new card? Edit credit card option doesn't work.
Resolved by talking to an agent over FB Messenger. Basically you'll have them deleting your current card, then you can add you replacement card back at their website (after several refreshes and re-login to see that take effect).
It's pretty straight-forward and the agent was quite helpful, just you have to go through them instead of doing it all by yourself.