I paid for the game but it's still demo (demo)

Good afternoon, last February 14 I bought Minecraft Java Edition, the only thing is that it comes out only as a demonstration (demo) I think it is a bug so I send the complaint here to contact the global telephone numbers (in Costa Rica) and I They responded that I will speak to you, I need your help, please. My friends answered that it was a crash and I will also speak with you.