I bought minecraft on my old pc, and now i have a new one and i cant load into any of my minecraft games.

I have got a new pc for Christmas and i wanted to play some Minecraft like I would on my old pc, and I signed in as usual and it said that I haven't got any of the Minecraft games bought when i have bought them previously a while back. I'm not sure how to fix this but my username is Ollie23239849. I'm not sure why this is bugged but if you get back to me ASAP that would be good. Also I'm pretty sure that when I bought bedrock I should have received java to but that could have been before that deal came out.