My iPhone Ios 7 is killing me

I had to update the ihpone so it would work. Everything seems fine at first until I wanted to buy a song from itunes.

You see, I want to buy a song and for some reason when I press download it will not download, it will just suddenly stop and I have to try again.

So I find the settings in itunes and app store to get music and apps to be turned on in automatic download… But it switches back to off right away. I'm going to kill this phone seriously!

I don't know what to do.

Visit apple store or call apple care