Please reach out to our Support team at msft.it/6013w6ahN in order to keep your account info secure, and one of our Technical Specialists will be able to troubleshoot this issue with you. ^FF
Please reach out to our Realms team by completing our request form at msft.it/6011w6a49. Make sure to include the error message(s) that you're encountering, so we can investigate this issue further for you! ^FF
Is this for the Java or Bedrock version of Minecraft? Also, can you send us a screenshot or photo of the specific error message that you're seeing? Make sure to block out any personal account info for your privacy and security! ^FF
On the Bedrock versions of Minecraft, upgrading a map will end up clearing it, so you'll need to re-explore your world to fill it back up. If you'd like, you can share your feedback on this here: msft.it/6019w6a2t. ^FF
Please visit our bug report site to see if the problem has already been reported: msft.it/6014w6a2p. You can upvote if the issue hasn't been resolved. If you think you've found a new bug, visit our help site here on how to submit a report! msft.it/6015w6a2V ^TK
You'll need to choose a different Microsoft account to migrate to in that case. If your brother unintentionally migrated his Mojang account to your Microsoft account, then he'll need to reach out to our Support team for further assistance: msft.it/6013w6a0S. ^FF
If you didn't receive a Transaction ID with your purchase, this might mean that your purchase failed: msft.it/6015w6aIW. If you did receive a Transaction ID, then please reach out to our Support team so can assist you further: msft.it/6016w6aIo. ^FF
Minecraft is a one-time purchase. The only recurring charges you would possible see would be if you decide to sign up for a Realm Subscription, but this is something that is totally optional. Let us know if you have any other questions! ^FF
If you're having any issues with signing in to your account, please complete our request form at msft.it/6016w6avu to order keep your information secure! ^FF
Are you seeing any specific error codes when you try to sign in? Feel free to attach a screenshot in your reply while making sure to block any account info for your safety/privacy! ^FF
There might be a few reasons why they aren't unlocking for you. Please see our FAQ: msft.it/6018w6aqA to see if this issue can be resolved. If you're still having any issues with achievements, let us know and include any error messages you might be seeing. ^FF
Can you let us know what error message(s) you might be seeing when you try installing the game? Also, is this for Java or Bedrock? Let us know and we'll take a look into this for you. ^FF