Hello,
It seems you’re experiencing trouble with your Microsoft licenses. Microsoft has transitioned all volume licensing capabilities previously available in the VLSC to Microsoft 365 admin center. If issue arise during the transfer, please contact Volume Licensing Support. You can contact them via this link: Volume Licensing Support Info. | Microsoft Learn
Also, you can find Microsoft product support through the following link: https://support.microsoft.com or Global Customer Service phone numbers - Microsoft Support
References: Frequently Asked Questions for the Volume Licensing Service Center | Microsoft Learn
I hope this helps.
Best regards