What's wrong?

Okay.
Everyday.
Came back from school.
My mum want rest and call me don't practise piano but practise at 5-7 pm.
Good.
5-7 pm my sister want sleep.
After that, father come back at night and call me don't play le.
Saturday and Sunday almost whole day not home.
And piano exam coming.
So.
I WANT TO SAY.
WHAT THE PURPOSE FOR BUY A PIANO HOME?
JUST PUT THERE FOR WHAT?
PAID MONEY FOR PIANO EXAM.
SO.
WANT TO WASTE ISIT???!!!!