Account name change, need Whitelist

[Toddbringer 159]

Thanks for looking in on my post. My account name was Toddbringer until a name change I accidentally made. I have since changed it again, but for some odd reason, my account is no longer able to take the name back. After I migrated accounts from Mojang to Microsoft Its like I'm barred from my previous username. My new username, Toddbrungy, is listed on my profile. If you need any more information, let me know. Thank you for your time.