Can I get my money back for Apple Music don’t want it

You must start by canceling your Apple Music subscription, you do this here:

Settings → Apple ID → Subscriptions

Select Apple Music, tap in and select "Cancel Subscription" If you are in the middle of a period, you will have access to subscriptions until it expires. After that, the subscription closes permanently.

When Apple Music is canceled, you can see how to request a refund here:

Request a refund for apps or content that you bought from Apple - Apple Support