See if you didnāt accidentally select the wrong organization in the UI, upper left of the platform site. Some accounts have a second org āpersonalā, besides those from invitation.
Payments also go only to the selected org.
Do existing API keys that were in use now return the tiny rate limit of tier-0 in the API call header?
It seems that my previous organization is deleted or unavailable. Because now I see only 1 organization called as āPersonalā which does not have any previous payment method and invoice history and usage settings.
Previously there was different organization name. now it has only 1 organization.
It might have been stolen from you by a hacker with your login. They can set themselves as owner on their account when sending an invite, and then demote or remove you.
I would swiftly get in contact with OpenAI, using āhelpā in the menu to have it restored, with any info about the org ID and name that you retain.