Do you have any olive oil? Take small pieces of bread, soak them in olive oil, and see if she'll take it. Massage her crop to try and break down the stuff in it. You won't notice results right away, it can take a few days for the crop to go back down. Just keep giving her oil and massages every few hours or so. Don't give her any food, but she can have water. Once the crop goes down you can give her small amounts of mashed pellets soaked in warm water, and also yogurt. Keep her on soft food for several more days even after the crop has gone completely down. Introduce pellet food back slowly in small quantities at a time. Also try and find out what cased the impaction in the first place. Too much grass, hay, small grit, stuff like that.
Try not to panic, it's not immediately life threatening, only if its been prolonged it can cause starvation.
If the oil and massage doesn't work she will need to have an operation to remove the mass.
