Navigation Buttons next/prev

 So I am working on some final touches for a school project which is a interactive magazine and I have to include navaigation buttons Prev/Next and I created them but somehow it wasn't working so I tried again and now I can't get rid of them and start over cause none of this text is in any of my layers and I unlocked all my layers and I tried clicking on them to get rid of them and I got nowhere I don't know what to do so if anyone knows how to fix this please respond ASAP!  If you need furthur information I can provide a screen recording just let me know thanks so much in advance!