We don't work for Microsoft.
When Microsoft ended support for XP, they were quick to say we will continue to re-activate XP if you have to reinstall, etc..
But over the last few years they seem to have dodged the issue and deleted the links about this.
Contact them by one of these methods and keep contacting them until they do sort it out for you.
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To contact Microsoft Support:
What can we help you with?
https://support.microsoft.com/en-us
Contact support
http://windows.microsoft.com/en-us/windows/contact-support
Also: https://partner.support.services.microsoft.com/en-au/contact/menu/software/windows/setup/
"Microsoft office locations around the world"
https://www.microsoft.com/en-us/worldwide.aspx
"Global Customer Service phone numbers"
https://support.microsoft.com/en-au/help/13948/global-customer-service-phone-numbers
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