Help! My cat sleeps all day and doesn't sleep at night?

I've just got a cat 3 days ago, it's got it own little room and it's pwn bed because it wouldn't sleep in the bed we made for him. It's cute but it sleeps no-stop these days and we can't wake him up because my parents need to go to work and i need to go to school. Every night it meows no-stop and even scratch the door. We are all really tired so we can't play with him. My parents can hear him and i can too. He's only 3 years old so it's not too old for a cat. We can't let him any where else i. The house because it

says it needs to stay in a small place when it's first arrived. If we put it down stairs we r scared it might go to the kitchen and knock everything down. What to we do? It's a sweet cat but this really annoys us. Plzz help. Best answer gets 10points