I payed the game but i didn't recive it

I pucharced the game a few days ago, but when I enter tho the launcher it only gives me playing a demo world or buying the game. I recieved a e-mail with the aquittance which is attached to this message and in my credit card movements it puts that I payed the game.

I'd like to have an answer of why it happens or a way to solve it.

Thanks.