Hello.
If none of the methods work, then you should contact Microsoft Support directly in the chat: https://support.microsoft.com/en-US/home/contac...
In the search bar, type (without quotes) "agent support" and press Enter or click on Get Help. Ignore the search results, and click on the "Contact Support" button at the bottom. On the next page, select "Windows" and "Technical Support" from the drop-down lists, and then click on "Confirm". Next, select the chat "Chat with a support agent in your web browser" and on the next page, enter your (the one that works) email address and click on "Confirm". A chat window will open in a new tab. Wait for the operator to respond and explain the situation to him.
Note. The chat is available during business hours and on business days according to US time.