If you're in an Anonymous account. Login buttons: Welcomescreen, bottom left. Friendscreen (minitowns) tap Bart/Milhouse, bottom right in the pop-up "add origin friends" enter log in info.
Either exit the game to access the Welcomescreen or play through the first levels to access the Bart/Milhouse button to take you to the Friendscreen with the minitown.
This Forum is provided by EA but is designed as Player helping/advising other Players. In this case there is little other players can do for you.
Contact EA directly
http://help.ea.com/en/contact-us/new/ and ask for a gameadvisor. Same login as the game.
*** Is the issue resolved? Please click "Accept as solution" so others can benefit.***
*** Although xp is not required, it is very nice. Give a Kudos by clicking on the XP button if you feel a comment/post/response deserves it. ***
***I do not answer game questions in PMs. ***
+++ This Forum is provided by EA but it is designed as Player helping/advising other Players - meaning we are not employed by EA +++
D'oh! - Em