Help

I love this game, I got 4 of my friends addicted, but my problem is i bought the extra levels for 1 dollar and then earlier today updated it cause it had a update, but now it wont let me back to my levels, its saying to purchase it, I click ok and it says I already purchased it press ok to download and I did and nothing happens!! I wanna finish my game!

Swag: about Wipeout Dash, v1.3