How do I get this update to stop?

I tried to update my iPhone 5 to iOS 7 today, and the screen said to connect to iTunes. I did, and iTunes told me it was "an iPhone in recovery" and to sync it needed to be restored, so I went through the process on the computer. Right as the process ended, it told me on the computer, "iPhone not found." Yet my phone screen is stuck on connect to iTunes and will not open or turn on or off, but obviously it won't connect to iTunes. I just want to use my phone ASAP I dont care about the update anymore! Please help!