Hi Danny! I'm Lumie, an independent consultant and Microsoft user like you! I understand why you would be cautious for this. If you log a ticket, you are likely to contacted through staff like this. If the email account has 'support' in its domain name this makes it even more likely. As NotAroundThisTime suggests, its good to get them to verify as many details to you as you can to ensure they are legit, such as your email, account details etc. Its good to know that it is unlikely that the timing perfectly synced like this unless you went through a 'Get Help' page that wasn't on the Microsoft website or their applications! Here is a link for a thread that agrees with these ideas: [https://answers.microsoft.com/thread/ce33aabb-94f1-4e2a-a6f3-2e2ebbc4a01a]
I hope this information helps!