Open the Settings app on your iPhone or iPad
Tap your name at the top (Apple ID)
Tap Subscriptions
Tap Apple Music
Tap Cancel Subscription
Confirm by tapping Confirm or Cancel Subscription again
On your Mac: open the App Store
Click your name (bottom-left)
Click View Information
Scroll to Subscriptions and click Manage
Select Apple Music
Click Cancel Subscription
Confirm cancellation
On the web: go to https://music.apple.com/
Sign in with your Apple ID
Click your profile icon
Click Account Settings
Under Subscriptions, find Apple Music and click Manage
Select Cancel Subscription and confirm