Generally speaking, if your query is regarding your child's music education, your first point of contact should be their Band Conductor or Band Director.
Examples: Queries regarding student progress, behaviour, learning material (music pieces), student progression, or advice on private tutoring.
If your query is administrative, you should get in contact with your Band Coordinator, Band Administrator, or Convenor.
Examples: Queries regarding upcoming performance details, instrument hire, instrument repairs, absentees, Band Camp, Band Fees, etc.