According to the below article you should be able to cancel an account deletion.
After I click cancel, I get a message that user will be active again, but now several hours later its still marked for deletion?
Is this a bug I need to report, or is there some kind of huge time delay?
/Karsten Markmann
Delete a managed account | Atlassian Cloud | Atlassian Documentation
Cancel an account deletion
If you’ve scheduled an account for deletion, you can cancel the deletion before the 14-day grace period is over. Once you cancel the deletion, we’ll start billing you and other organizations for the user.
To cancel a deletion:
From the Managed accounts page, click Edit account next to the user’s account.
From the user’s account page, click Cancel deletion.
From the confirmation dialog that appears, review the Atlassian account services that the user will regain access to and confirm that you want to cancel the deletion.
After you’ve canceled deletion, the user’s account is fully restored and active. We’ll send the user an email letting them know they can now log in to all services they previously could access.
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