My iPhone 5C says I don't have enough storage?

I deleted all of my apps, music, messages, and I got rid of about 800 photos from my camera roll because it said I don't have enough storage to take photos or download apps.
After deleting all of that, I tried downloading snapchat, but it still says I don't have enough storage!
I'm so angry! What's wrong with this phone? I need to check my snapchat urgently but I can't download it now.

New phone

I do not understand why so many iPhone owners post questions about running out of memory on this site and yet don't say how iTunes describe their memory being used. This is one of the easiest things that having an iOS device. It tells you how your memory is being used. How was peoples how to tell you how to reduce your memory gap we don't say how your memories bring used to begin with?

The only possible suggestion I can make is this. You have not set your iPhone for manual management of music and video. When this is not selected, iTunes well very often we serve as much memory on your iPhone as is needed to hold everything on your iTunes library on your computer.

Just look for a way to do it yourself mate, idiots on this site don't know what they're doing most of the time.