I Think I set up with wrong Username?

[Firejeremy10]

I think I set my account up with wrong minecraft username because my login name is my email and my display name is Firejeremy10 I think I have it wrong,when I signed up for minecraft it redirected me to the Mojang website so...Is this right or wrong?If wrong how can I change it?

 

[RC_4777]

You may need to contact an administrator to change it for you.