Bought a iphone 5s but want a iphone 6?

I recenlty bought a iphone 5s waisted about 700 $ for sprint i have less then a month but more then 14 days i was wondering if i can get store credit or be able to return it to get the iphone 6 for sprint?

How to restore iphone 4 after disabled?

I accidentally got locked out of my iPhone 4 and it says to connect to iTunes and i read the steps how to but i'm worried that it will not give me any of my data back, I'm only 13 and my parents won't be home till tomorrow and i have to be in touch with them and we don't have a home phone. I was also thinking about having my dad take me to the apple store tomorrow but i want to be able to call him tonight