Fix and publish an Android application

Hi I have already created an app for ringtones. User can download the play the ringtone on the app. Now I want two work for the same. 1. User can directly set the app to the android phones with button. 2. When I published the previous version. Google rejected the app as I used the ringtones from the web. So other task is how we can publish the app on the play store. As like that many applications running on the play store.