The game does not exist in my account but I am sure I already bought one.

I lose my game. I already bought a Minecraft: JD in my account and I AFK for nearly 2 months since the last time I start it. Today when I open my launcher and login with my account it shows me 'buy now!'. This situation have happened once but I just abandon that account and bought a new one. I really love this game and I hope there is someone who can help me with this.