Sacred Odyssey Problems

I downloaded the full game yesterday and I eventually got it working. Every time I go into play it it asks for my password again. Started off by inputting password but then pressed cancel one time by mistake. I thought it would close the app but it let me continue playing. This has happened quite a lot but now I have got a message saying 'The full content of this application may have been illegally obtained' and it has deleted my saved game and taken me back to the purchase screen. I bought an itunes voucher from Sainsburys supermarket yesterday to buy this game so I cannot see how it could be illegal. I don't want to buy game in full again just in case I am charged again. Any ideas what I should do??

The IAP would've been logged on your apple account. tapping "buy game" won't mean you buy it again, same as downloading a previously bought app from the app store doesn't charge you again.

Thanks for the reply. It is the illegally obtained bit I am worried about - will the app store have taken it off me completely because of this