my game has been reset and it doesn't work even though i paid

When I tried to install a resource pack on my game it froze and although I waited for hours this continued. And then when I tried to close and open my game, no version started to open. And then when I entered the control panel of my computer and clicked on the repair the game's downloader option my game was reset and the main problem is that even though I paid for the game, I cannot access and download the game from anywhere. please help me.