How do I permanently delete music from iCloud?

I just got an iPhone 6 and was able to get my music from my old iPod 4 onto it. When I went to look at my music, there were about 6 (more or less) songs from the same album that I never purchased or downloaded, so I have no idea how they got there. That is one thing that confuses me. Another is that when I checked my music on my iPod, those songs weren't there. Yet they were still on my phone. I tried deleting them, but it showed that they were still saved in iCloud. Since I never downloaded them in the first place, I dont want them at all. So, how am I supposed to permanently delete them from iCloud?