I used the Apple Music free trial for a month a couple days ago. For a flight I downloaded music and they charged me without me knowing about with no information what so ever. I want my money back.

Hi there clo_toe,

We're happy to provide some information. There isn't currently a promotional offer from Apple for one month free of Apple Music. The only promotion Apple is offering is for a 6 month free trial:

New subscribers get 6 months of Apple Music free with eligible AirPods, HomePod speakers, or Beats headphones, subject to the terms and conditions herein.

You'll find this information here: Offers - Apple

Keeping that in mind, if you redeemed an offer for Apple Music from a third-party, you'll want to reach out to whomever was offering the promotion for more help.

Also, if you don't want to be charged for Apple Music, you can cancel the subscription with these steps: If you want to cancel a subscription from Apple - Apple Support

Afterwards, you can request a refund with the guidance here: Request a refund for apps or content that you bought from Apple - Apple Support

For more help, reach out to Apple Support directly. This link will help you get started: Contact - Official Apple Support

Take care.