Changed ISP and email now cannot sign out on my iphone
I changed my ISP and email and was able to updated my Apple ID on iTunes but was then unable to do so on my iphone/iCloud. The old ISP and email address no longer exist, but it keeps asking for the old password. When I try to sign in so that I can sign out, it tells me that my password is wrong so I can't even get a new password to sign out.
Any suggestions gratefully received. Many thanks.
iPhone 5c