Don’t expect Microsoft to help!
Even if you could get a hold of someone at Microsoft, they won’t help you.
Here’s a direct quote from the Microsoft Website
Help with upgrading to Windows 10
Here are some answers to questions you might have while upgrading your PC to Windows 10
With your reservation, you’re in the queue for your upgrade. Watch for your notification from the Get Windows 10 app to arrive in the coming days or weeks. At that point, you can upgrade immediately or pick a time that works for you. If you haven’t reserved your upgrade to Windows 10 yet, you can still use the Get Windows 10 to reserve it. For more about how to get the free upgrade, go to the Windows 10. Microsoft will not call customers to assist with the installation or technical support for Windows 10, nor will we send an email with any upgrade or installation files attached.