Buying the game by windows store

few days ago i buy the game in the windows store but only because the page of the game dosent charge the payment, i try a lot of times and it dosent works so i buyit thinking that it would work from the launcher basiclly its the same acount and all that so that have sense, then i notice that i cant and the launcher say buy the game, i think again ok maybe its takes some tome to update the info, i changed the nick and in the launcher changed like 24 hours later so i keep waiting. but now it dosent work in the launcher, exist some way to change from the windows store to the launcher? the windows store is not confortable at all.
thanks for any response