GREAT GAME BUT I CANT PLAY IT!?!?!

I bought the game a week ago and it was awesome i got through to the second place and when i went to play it today it said i had to buy the full version?!?! I tried to restore the purchase but it said i didnt buy it? Now i cant play it and i paid like 3.00 dollars for it, ridiculous!

TheSickBud!? about Horizon Chase, v1.3.3