it says i havent bought minecraft and it says i havent bought dungeons

i dont really get the different versions of minecraft so i put it as macOS and Windows. a week ago i bought minecraft for 17.95 pounds and today i bought minecraft dungeons hero edition for 25 pounds. yesterday it said that i couldnt play online but i didnt play online so i brushed it off then today it said play demo and it said i have to buy minecraft again but it seemed like nothing happened to my minecraft when i loaded it up so thats confusing. i bought minecraft dungeons to take my mind of it and to play something else whilst i thought of ideas and then when i had downloaded it i checked the launcher and it said buy now. i tried looking for why and it said if you bought it on microsoft (which i didnt) then launch it from here. i am very worried considering i have spent alot of money on this and i cant play it, please help.