Hi Feyz. My name is Lester, and I am an Independent Advisor. I'm sorry that you are experiencing this issue. I'd be more than happy to assist you.
As far as I know, Microsoft no longer directly sells Windows 10 licenses, as their current focus is on promoting Windows 11. However, you can still purchase Windows 10 licenses from authorized retailers, who may have remaining stock available for purchase.
I hope this information is helpful. Please don't hesitate to reach out if you have any more questions. Thank you