I dont understand why it wont let me register.

I just want to play minecraft but every time I try to register it says I already have an account. Ive never been on Mojang website before and Ive never played minecraft for the pc so I have no idea why it keeps saying that. I even tried making a whole brand new email for it and it still says that iIhave an account with that email...wtf I literally just made it..... Please help because this is stupid. I have to make an account for a complaint so I can make an account to play the stupid game..... please fix or email me ways around this.

Good Day.