How to do this? I've tried everything?

I got an iPhone 5c on Sunday and I just tried putting my iTunes music on it today. Well I plugged it in and immediately every single song on my family's shared account poured into it and there's at least 50 of them I do not want. I've tried swiping my finger across and it does not work and neither does looking through settings trying to find what the hell to do. I'm very angry because I don't want the room on my phone to fill up because of all these songs. I do not want to simply hide the music I don't want, I want to remove it from the phone.

While in itunes. Click on the little your ipod icon and deselect the Sync songs button. Syncing songs downloads all of the songs in your itunes library at once onto your phone.

This has happened to me too the thing i did to get it off was to reset it back to factory settings. From there i just redid every thing and downloaded off the itunes on the phone. I believe that there's something in the settings to make it where it doesn't do this like no family share or something like that, when i had this happened i had accidentally checked a box that downloaded all of it. Sorry if i wasn't any help, you could try calling apple support they have always helped me fix my problems.