If the records haven't vanished yet, I don't think they are going to, not without some help anyway . If I were you, I'd lodge that support request now.
It's a pain when the records get stuck, as it prevents you from adding the same sub-domain back into the system, should you wish to do so.
You might also want to mention the log file directory in your support request, as I don't believe we mortals can delete them, due to permissions.
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