My name account was changed without my confirmation.

Hello, this afternoon I entered the Minecraft launcher and I saw that my username has been changed without my consent, my original username was JoseCampillo and now the name that appears in my account is Ryl1ax. I do not understand how it could happen, I have gone to the Minecraft website to edit my account and it tells me that I cannot change my profile name for 30 days. I need help because I have not changed anything and I have checked that all my accounts are secure and I need help, thank you.