I need to cancel my music subscription please help me

Hello Eibbedm, On your iPhone go to Settings > click on Apple ID, iCloud, Media &Purchases > Click on Subscriptions > Find Your active subscription you want to cancel and click on it > At the bottom you'll see Cancel Subscription. Click on that to cancel.

Here look at this How to cancel a subscription from Apple – Apple Support (AU)

Eibbedm, Ok try thus Apple Support page on music subscription cancellation.

How to cancel Apple Music - Apple Support