You realize it is Sunday, right? And that probably a lot of relevant people are not in the office today, even if the techops grunts who are on call are scrambling.
Day of the week is irrelevant for an organisation that big. If you can't escalate a major incident like this to a designated person - even if you have to wake them up - your process and business continuity plans are seriously flawed.
We updated the certificate about an hour before this post. It takes 6 - 8 hours for the certificate to fully propagate.