Can a purchase be reversed if I bought an album and then again the bonus version which I did not want?
Can a purchase be reversed if I bought an album and then inadvertently also bought the bonus album? If yes, is there a method and a time limit?
You probably cannot get a refund, since the terms of sale for the iTunes Store state that all sales are final. You can contact the iTunes Store, explain the reason for your request, and ask, though:
http://www.apple.com/support/itunes/contact.html
It's possible they'll make an exception for you.
Good luck.
Forum Tip: Since you're new here, you've probably not discovered the Search feature available on every Communities page, but next time, it might save you time (and everyone else from having to answer the same question multiple times) if you search a couple of ways for a topic, both in the relevant forums and in the Apple Knowledge Base, before you post a question.