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.
You can, as mentioned above, purchase a reset token from our web store for free at https://store.potterworldmc.com/, and then you have to do /reset in-game to do the actual reset; ensure you read through what it says carefully as this cannot be reverted.