Need help. Huge mistake has been made.

Is there any way to unclaim a code that has been "applied yo my account"?
I need to know how this is achieved.
I have made a massive mistake
And it has caused some problems with my family,
Specifically my brother, who goes by Griphon(ign) or GriphOn(forums).
Or at least point me in the right direction on how Trion can help me with my problem.
I am desperate.