Minecraft Dungeon unavailable after purchase

I bought minecraft dungeons earlier today but when I tried to go to it to play, the only option I had was to 'buy now' again. I can provide order number if necessary.

 

Update: I figured out that the purchase was separate from my Mojang account. For some reason it is making me use my Microsoft Account for it, and now I am wondering if there is a way to transfer it over to my Mojang account?