Your main portal for account management is my.atlassian.com - you will be able to update the billing and technical contacts, alongside updating your credit card details or purchasing additional products.
Here is a great FAQ - you would be most interested in 'Managing My Account': https://www.atlassian.com/licensing/purchase-licensing
Not helpful &/or outdated.
There's nothing on my.atlassian.com to help me figure out where to change billing details. The words "credit" and "billing" do not show up.
The instructions you linked to at https://www.atlassian.com/licensing/purchase-licensing lead me to "3. How do I change the credit card for my Atlassian Cloud subscription?", but the instructions don't match what I'm seeing on this page.
The closest I've been able to get is at https://id.atlassian.com/manage/billing, but this only shows my billing address - I cannot change a credit card number anywhere.
This is a really aggravating search. Please fix all these things, and then put a down-vote option on these pages so we can vote out the useless ones.
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