Re: Entered incorrect email address on registration
It sounds like you need to contact EA. Only they can handle account issues like lost registration codes, recovering passwords, changing email addresses, purchasing/refunds, etc. Here is a link to contact them: https://help.ea.com/contact-us
Also, here's a post on how to navigate the contact page in case it's confusing: http://sims3.crinrict.com/en/2012/10/how-to-contact-ea.html (Just so you know there is no longer an email option, only live chat and phone.)
Best of luck.