How to delete music off of your iPhone 4s?

Music that i tried downloading a long time ago is still showing on my phone and i;m trying to delete all my music and my phone says its all deleted but then when you go to the music app the music that hasn't loaded is still there. How do you delete that? I have iFile from cydia and it's still showing. I'm literally about to smash my phone.tell me how please

You should first install PC software and then you can delete music files.

Go into the music on your phone then swipe your finger across the song you want to delete then a red delete button should come up the press that and they should delete of there