DISCLAIMER: Potterworld or Droobledore LLC is not in any way affiliated with Mojang AB, J.K. Rowling, Warner Brothers or any company, copyright or trademark.
Heyo @bigdongmia,
you need to type /wands in-game to change wand appearances.
If you still having questions about wands/hats you can create ticket in-game by doing /t create and staff member will help you!