Windows 10: I can't activate Windows 11 pro and I can't get help

I had a Microsoft specialist call me and ask to take control of my computer to activate Windows 11 pro and he said that I must have clicked Windows home instead of Windows 11 pro when I installed it on my new computer. He ran some updates and typed in some codes and restarted my computer. Then he said that now I can activate my Windows 11 pro with my activation key code and hung up on me. I entered the key code to find out that it was activated on a different computer, an Acer tablet which I've never owned..I set up another contact support and was called by a different agent to tell him what's

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AT&T Activates Call Validation Displays

Source: AT&T Activates Call Validation Displays

 

Activation of Windows 10 Pro doesn´t work

Hallo, i can´t activate my windows 10 Pro (free upgrade from windows 7);

Info: 0xC0EA000A

Manual activation doesn´t work either.

Important (i think): I had to re-install windows 10 (3 or even 4 times). because I had massive problems with "Start and Cortana Issues".

I hope, I don´t have to search the old product key.

PS. Yes, Windows 7 was genuine.

 

Windows 11 Pro - confirmation email not received and I can´t activate it

Hello,

I read through +15 different support and community pages and I couldn´t find instructions to solve my issue that worked.

I purchased from the Microsoft Website (Comprar Windows 11 Pro - Microsoft Store es-ES), not the Microsoft Store. And I selected the "download" option. It´s been over 24 hours since the purchase.

There´s no product key in my Order History, I haven´t received the expected order confirmation email with instructions and the download link, and my Windows active versions is still Windows 11 Home. I´m completely stuck.

Please advise.