Hello Yelaman, I am Henry and I want to help you with this issue.
I'm not sure if you'll find the phone number through the Microsoft Data Protection Team contact list.
If you've already tried that but are still experiencing issues, Microsoft offers a web page that sometimes acts as a self-service version of the phone activation system.
- Go to the Microsoft Self-Service Activation Website: (spam link removed by Moderator)
- Enter Your Installation ID
- Submit and Receive the Confirmation ID:
- After submitting, if your Installation ID is valid, the website will generate and display your Confirmation ID.
- You can then enter this Confirmation ID into your server's activation window to complete the process.
Hope one of these works for you. If you find this guidance helpful, you're welcome to click 'Accept Answer'—it helps others find useful solutions too.