I fu**ing hate Microsoft. They have forced every Minecraft player to migrate their account to Microsoft accounts. I did this a few days ago and intended to play today.
My account was *instantly* suspended for violating their ToS. I guess logging into MultiMC and wanting to play is not okay?
There's no way of contacting them and there's no way of recovering my +10 year old Minecraft account.
Please Microsoft, just curl up and die you piece of shit company.