My old email adress linked to iCloud, does not longer exist
I want to reinstall the whole content and settings in my iPad mini 2. But the thing is that when I connected my Apple ID to iCloud I used my old email adress, before I changed to a new email adress now connected to Apple and iCloud. So the not longer existing email is on my iPad and I can't change it, I know my password I used on the Apple ID I used with my old email adress, but because my email adress is no longer in Apples systems or existing, I can't change my iCloud account on my iPad that is really frustrating. I have tried to connect to iTunes, iForgot etc. But everywhere I have tried (also in Electronic Stores selling Apple products) does not know what to do, and I can't turn off either "find my iPad" or delete the whole content because of the security. Can someone please help me, what to do. I really need help. 😢
iPad Mini, iOS 8.1