I have ringtones on my phone, but I can't find them to get rid of them.

So, I got the x and I love it. VO works great, thing is I have ringtones that came over from my back up when I set up the phone. I got them from the iTunes store. They are on my phone and I want to get rid of them or just have them on my mac. When I connect my phone to my mac and go under my device, it says there are no tones so I can not find them to be able to delete them and if I could find them, how would I go about getting rid of them without having to reset the phone to factory?
Please help