Cannot use iCloud on my iPhone
I am trying to use iCloud on my iPhone but somehow it has an old email address as my Apple id and it will not let me change it. I have no idea how it got that old email address, except it was my Apple id many years ago. I have tried to delete iCloud from my phone but it tells me that I must enter a password for that old Apple id to delete Find My iPhone, which I apparently don't remember, so I cannot delete the app. I tried to recover the password for that email address thru forgot password but it says I put in the incorrect birthdate, and of course I can't have it email it to me since I no longer have that email address. Everything else on my iPhone uses my current Apple id. I have already signed out and back into everything using my current id. Any other suggestions? Thanks!!
iPhone 4, iOS 7.0.2