First off, punishing her for not wanting to go potty is the wrong road to take. Some kids feel that when they pee or poop that a part of their body is falling out and it's very disturbing to them. So the idea is to make it fun, show them everyone goes to the potty and above all DO NOT punish her for accidents.
Take one weekend: get a portable potty, lots of water, potty videos with elmo, bear in the big blue house, etc and books. On the first day from the minute she wakes up take her to the potty (even if she doesn't have to go. coax her with a new book you want to read to her while she's on the pot). Even if she doesn't go, keep reading to her until she does. Every child goes in the morning.
Through out the entire day fill her full of any type of liquid but not soda or caffeinated drinks. Then after, every 10 minutes take her to the potty. When she DOES use the potty celebrate it with horns, shakers, hugs and tons of kisses! The idea is to make this a good experience for her. This will take some time. Some kids get it down the first day and others take the entire weekend but I promise you that if you stick to the routine (every 10 minutes) that she will go. Also, you can take her with you to the bathroom and show her that "mommy uses the potty too". This will help her not be so against going to the potty.
Good luck!