I just got a new cage! Our old one had two birds and it was like 16x16x20, which sucks yeah. Now it's just her, and I bought her a beautiful cage that is 26x18x31, and I just spent all day setting it up :):):):)
I put it where her old cage was, I put her old ladder and food containers in, and I put her favorite swing she sleeps on every night the highest I could in the cage.
She still won't go in, but hopefully she'll get hungry soon, see the food in the new cage, and then go in, eat, and try her new toys!
It is a little overcrowded with the toys, but she still has more room then the old cage, and I think she'll love it when she gives it a chance