When adding my card either online on this website, or directly from the xbox, it tells me "Please enter a valid credit card number." on the site.
And on the xbox itself, it says "Can't authorize the selected payment option. Please select a different payment option or add a new one."
The only reason I could think of anything like this happening, is because I'm using the same card information as a banned account. But I highly doubt that's an issue, since MS would never do that. They want their money no matter what.
Help is appreciated, thanks in advance.
Nevermind, I solved the issue. It was because my Name/Address information did not match the new info.