How can I tell if my iphone has been hacked? and how do I fix it?

The black "border" at the top of the screen that has the signal strength,carrier name, 3g or wifi,time and battery is a extra width wide. but the extra width is totally blank.

my phone flashes at certain times, ALL my passwords have been changes and in my email things have been moves around.. settings to do with my email where changed on my phone. i have not gone threw with a fine comb to see what else has been changed.

I have set my setting bck to normal and changed all my passwords, I deleted my last backup to icloud, have reset my carrier and erased all content and data.

What else can I do? its still not right.

PLEASE HELP