Board Thread:Tapped Out Help/@comment-5331817-20130216043739/@comment-26143371-20150706134409

Your account wasn't hacked, this is a known issue and has happend to quiet a few players. It is most likely connected to the Land Expansions released with the Tap Ball 2015 Event.

You can try to contact EA, in your case the last two options will be the most helpful ones.