You really need to take this up with Big Fish Games first (assuming I found the right "Sacra Terra" game), not the iTunes Store. It's the developer's responsibility to address use questions and fix bugs.
http://bigfishgames.custhelp.com/app/answers/detail/a_id/362
You can also ask in their own forums:
http://forums.bigfishgames.com/forums/list.page
If you can't get any help from Big Fish, you can try reporting the problem to the iTunes Store here:
http://www.apple.com/emea/support/itunes/contact.html
but all they would be able to do is provide a refund assuming you paid to unlock the full game. Whether they would do so I don't know, but you can ask. Contact the developer first, though, and then if you get no help from them you can at least tell the iTunes Store that you tried.
Regards.