Hi,
We suggest that you should contact Volume Licensing Service Center to check the issue.
If they could not help, please contact Microsoft Customer Support and Services to raise a ticket to resolve the issue.
You may find phone number for your region accordingly from the link below:
Global Customer Service phone numbers
https://support.microsoft.com/en-us/help/4051701/global-customer-service-phone-numbers
Thanks,
Eleven
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