Start a new conversation using Train-Me treats. Reward good behavior and she'll come around. We've had 4 Saints and using these treats with the last two made a world of difference. For example, tell her to sit and reward her with a treat when she does. She'll quickly learn to do what you say when she realizes there's a treat on the line.
If you google "puppy kindergarten, you'll find people who run such classes and hopefully there's one in your area. But check out the sites anyway to see what they offer.
I think ours lasted 10 weeks and had around 10-12 dogs altogether. The important thing is to start right away with formal training since this is when they start to form their habits.
You might also buy some of these to reward good behavior.
Deal link: Amazon