What do i do with my brand new iPhone 6 Plus?

What do i do with my brand new iPhone 6 Plus?

Added (1). I just got a brand new iPhone 6 Plus 128GB in the mail on Halloween Day that I ordered from AT&T. The phone did not turn on ever after chagrinning it overnight! So I went to an Apple store and they replaced it with another iPhone. Now after using it, I realized I can't text with one hand and the phone is too big for me! I called AT&T if they can swap it with an iPhone 6 but they refused to because they want the original iPhone. Apple refused to return or swap it or even give me my original phone

If I understand you need the original phone to get a new one yet the phone you already swapped is not being given back to you? If so: Write a letter to someone pretty high up in Apple and see if that works. If not name and shame the store on social networking or (I know it sounds a bit dramatic) tell a local newspaper or something. No company like this wants bad publicity so the chances are they will sort it for you.