So I got an email today from Adobe saying that my Creative Cloud membership is going to expire tomorrow and it asked me to update my billing information. I'd gladly do that, except I can't. I haven't been able to find any information about this, and I looked at the FAQs and they had a picture of the Payment Details with a link to edit payment info. Where is my link and how do I change my payment information?
Credit card https://helpx.adobe.com/utilities/credit-card.html may help
Change Account https://forums.adobe.com/thread/1465499
Creative Cloud chat support (all Creative Cloud customer service issues)
I have the same issue and haven't been able to solve it. Unfortunately the first link you posted does not work and the second is for a different issue.