Dear Sir/Madame

I was gifted Minecraft Java edition in the form of a code a few moths ago. Since then i have been playing the wonderful game non-stop. However today, I opened my launcher and it says i was not logged in. As such I proceeded to the Minecraft website to log in. When I logged in, it asked me the usual security questions. I then returned to the launcher. It said I was logged in but only offered to let me play the demo. I returned to the web page for Minecraft. I clicked on games and then on Minecraft and it said "get Minecraft". It then said that I didn't own the game. However just earlier today, I was playing Minecraft just fine. I do not know how this can be. Please can you advise me on what to do.

Yours's Faithfully