IPhone text stuck in landscape?

My screen rotation isn't locked, assistive touch trick doesn't work, and I've tried shaking the crud out of it.
I can't turn my phone off then back on because the power button is broken.
At this point, should I just go take my phone back to Verizon and get a new one? I haven't even had it for a year and all these problems.

(1) Try any game involving a accelerometer, and take notice if it works. This includes any game involving a tilt functionality.
(2) Take it to an Apple store genius bar. Since it hasn't been 1 year, you can get a free new iPhone if it's broken, & you haven't dropped it.
(3) Restore & make sure your iPhone is at the latest iOS version.