Microsoft Email Support

Hello TheyCallMeDemyx,

Thanks for posting on the Xbox forums. We understand that you are interested in learning how to contact Microsoft for assistance with an old account. What is the issue that you are experiencing with the old account? Are you attempting to

recover an old account? Does an error message or error code appear when the issue occurs? The best way to contact the Xbox Support Team is through
the Xbox Support website. Be sure to let us know the results
TheyCallMeDemyx!

Oh, I see. There's still a way to sort this out however you'll be needing to reach Mojang support and submit a ticket. You can reach them here:

https://help.minecraft.net/hc/en-us/request/new...

Oh, I see. You can try to recover the account here too:

https://account.live.com/acsr

Hello, my brother lost access to his minecraft account after the account migration. I sent an email to mojang and they said that they cant help me and that i need to contact microsoft about this problem, he doesnt remember email about the account or the password, all i have is a purchase receipt and some other information that might be able to help you locate his account, also we did migrate his account to my email but when he tried to download the game on microsoft store it says that we dont own the game so i have no idea how to fix this. thank you

Well i did and they told me to contact microsoft support about it