How to listen to music on Samsung?

Last year for Christmas I got a Samsung tablet. Idk what kind so don't ask. I recently got an email from Shazam saying I got a free CD of Reflection by Fifth Harmony. I already have the actual cd that I bought for my birthday, so I figured why not. I went ahead and accepted my free cd on my iPhone. It took me to google play website and where it says the price it said free so I clicked it so I would have it 'purchased'. I'm on my tablet trying to download it but it keeps taking to Google Play Music. Do I really have to pay to listen to my music? What if I were to really buy music, would I seriously have to pay to listen to my music I already bought? If not, how can I listen?

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