Same here, got bumped from $5/mo plan to the $20/mo plan. AT&T fixed it and credited it back, just glad I noticed it.
FYI: I posted this yesterday. Perhaps a mod can merge them since it's the same issue. I can't link to it because my post count isn't high enough, but it's topic ID#192724 and the subject starts with "Check your bill"
-n8
06-28-2010 01:55 PM