Honestly, I have seen young birds like yours behave this way only to become docile, friendly beings later when they get past their version of terrible two's.  Specifically, there was a time when I was visiting someone with 20+ young birds and many of them acted like evil you know whats, biting me HARD. Man it hurt like the word much more appropriate than heck. I wouldn't hurt a fly but the pain of it made me want to retaliate (I didn't, of course!).  Then within a few months time or so they were all friendly - no more biting. It's like it was a phase or something. These were not birds that were handled much at all, but they nevertheless simmered down. Some people (not you) are awfully quick to sentence a bird for what might be temporary behavior. 
You may benefit from doing as was suggested above - gently holding her/him for periods of time so she knows you have the power but that you are also a benevolent dictator.
JJ
p.s. Holding them upside down, as some on BYC from time to time suggest, can be very dangerous for them - I don't recommend this. Not necessary.