It wants me to buy Mc java edition when i already have it.

Yesterday I decided to play Minecraft java edition and then it said "play demo" and I was confused since I had already bought Minecraft, so I went to the official website and logged in with the same account I used on the app and it showed that I already had Minecraft for that account by giving me the option to download Minecraft, I tried logging out and back in and it didn't work, and then I uninstalled Minecraft and that still didn't work please help me I don't wanna buy Minecraft again.