Some of my music is missing from my iphone. it doesnt show up in my itunes purchased music tab but if i search for the music to buy it again it shows that i have already purchased it with no way to download it again.
iPhone
If it's not showing in the Purchased tab (via the More button) in the iTunes Store app for redownloading check to see if you've hidden it from there : Hide and unhide apps for your iPhone, iPad, iPod touch, or Mac - Apple Support