Apple - I just bought the wrong album on iTunes. How do I give it back?
http://www.apple.com/support/itunes/
Contact customer support via e-mail and hopefully you can get a refund.
You can dispute the purchase within iTunes.
- Go to iTunes Store, view your Account (login if needed).
- Find and click on Purchase History.
- Click on the arrow next to the purchase to see the details
- Click on the report a Problem Button
- Click on the Report a Problem link next to the Playlist/Album in question.
- Select the Problem from the dropdown ( I inadvertently purchased this playlist)
- Fill in any comments.
- Hit Submit
This will send the request off to Apple Customer Support and they should credit you back. I have not done this myself, but a co-worker has and said it worked fine. They will likely flag your account though if this becomes a common thing.