I'm about to pull my hair out. I needed to change my email address because I no longer use the previous one. Sounds simple, but it has been a nightmare. I made the change on my iMac, then the trouble started. I've been messing with this for three days, doing what it tells me to do and my address still isn't changed and all sorts of messages are coming in telling me I need to do this, do that, and so on. It has screwed up my iPhone, iPad and iMac. If I wanted to order something from Apple I couldn't do it. Nothing I try works. My old email is still listed. Please help!