How to turn off iCloud on my iphone 5?

So i have an iphone 5, i've had it for about 6 months now, And i can't turn off "Find my iphone" which i need to do to unlock my phone. But everytime i go to iCloud i have to "verify" my account at my email, except my email is a fake one i used to make an itunes account. Please help?! I've already backed up my phone twice please tell me how to reset my phone without locking it with icloud

Depending on which device's settings you want to change, do one or more of the following:

On your iOS device's Home screen, go to Settings > iCloud, then tap to turn on or off iCloud features