You don't need the SEN to raise a ticket if you use this link: https://support.atlassian.com/servicedesk/customer/portal/23/create/185
You can just put your Cloud URL when raising the ticket.
If that doesn't work, you could try here: https://www.atlassian.com/company/contact/general-inquiries
Hope one of these helps.
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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