Q: how do you cancel apple music free trial?

See your original post for a response.  how can i cancel the free trial?

See: Manage your Apple Music membership on your iPhone, iPad, iPod touch, Mac, or PC - Apple Support, and look at the "Turn off Automatic Renewal" section.

Manage your Apple Music membership - Apple Support - https://support.apple.com/HT204939 - "Learn how to change from an Individual membership to a Family membership, turn off automatic renewal, or join Apple Music later.

How to cancel apple music subscription - https://discussions.apple.com/thread/7111504 - this only turns off the autorenewal process. If you must have the entire subscription canceled before the trial period ends you will have to use the contact link in Neil's post."