Downloaded new minecraft launcher now it says i only have the demo (java launcher)

I yesterday I got an alert on the old Minecraft launcher and so I said "okay" and downloaded it. It had a problem while downloading and it saying it was pending/un-able to download. I can't remember which. After I got the new launcher downloaded it said I only had the demo version. I could no longer play the full version of the game even though I bought it already. I tried to get back onto it on the old launcher but now it says the same thing. Both launchers only have the "play demo" option. I don't really know what to do, or what I could've done wrong to make this happen. (cant figure out how to add picture, sorry)