Hello. I bought Minecraft January 29th, 2012. I loved the game. I also played classic. Eventually, I migrated my Minecraft account. Then again. Today, I tried out World of Minecraft client, but I got this error message delayed to me, using my migrated username and password:

Unable to authenticate

Your username/password may be incorrect or there are no servers to validate your login.

This is right when I try to login, no delay. I have tried my regular username and password, I have tried my old migrated email. Nothing has worked.... Please help.