Changed my apple ID email address but some features on my phone remain locked to the old one
A few months ago I changed the email address associated with my apple ID. Mainly owing to the fact that I had forgotten the details of the old email address and therefore switched details on all my correspondence over to a new one. The change was successful on the whole however some features on the phone such as my icloud account and apps downloaded under the old name (couldn't update therefore had to reinstall and lose all app data). Now unable to change over as whenever I try it asks for the old account details, which now no longer exist. HELP!
iPhone 4, iOS 7.0.1
