I was really getting annoyed with my daughter's hobbies so I told her to find another one.
Was something wrong with her current hobby?
Seeing as her current hobby is smoking, yes. It's even affecting her schooling.
Wanting your daughter to find a new hobby under those circumstances is completely understandable. She's messing up her schooling and potentially damaging her body so of course you should tell her to stop. I can only hope that she listens to you.
She's going to continue what she's doing then.
I know it may be disheartening for you to see her continuing this bad habit. Just keep up on it and try to show her how bad it actually is. She may one day change her mind and appreciate you for it.