Bought Minecraft but only playable demo?

I bought Minecraft almost 4 days ago and downloaded the launcher normally, but I can only play the demo, does anyone know why? It is also there that it is the full version

Have you already registered your account in the launcher?

Yes have tried several times but unfortunately always the demo

How do you know it's the demo? And the latest full version has nothing to do with your Minecraft.

Sign into the account you bought the game with