I NEED HELP

 So my four year old daughter has been misbehaving alot latley....ussually I can put her in time out and tell her not to do it again but any more when I try that she just goes back to doing what I told her not to do.I dont believe in spankings and I dont want to yell at her....I have asked so many people what to do and they are either to harsh or their ideas dont work.SOMEONE PLEASE HELP ME!!