Can't login after migration

So, today I opened the launcher to play minecraft, when I saw that the account were migrating: I know very well that the security is everything when talkig about something you have to buy, soI simply did the migration. After that, the lancher didn't recognize my old mojang account, and it doesn't with my microsoft account either. I have buyed minecraft since two years, and i don't want to lose for just had migrated the account. I hope someone can help me, since the launcher does not want to cooperate with me.