Re: how do I delete my sims 3 account?

I think that you would be doing better with your problem by contacting EA's Help Center. 

http://help.ea.com/en/contact-us/new/?category=demo-beta

At the very least, the forum for either the Origin System or for the Sims 3's dedicated forum would have been a better option than "Other Games".

http://answers.ea.com/t5/Origin/bd-p/O-2

or

http://answers.ea.com/t5/The-Sims-3/bd-p/the-sims-3