Start over again like she is a tiny pup. She has missed the memo and you should start over. Also, have her checked for bowel or bladder issues. Crate, do business OUTSIDE, get some time out of the crate under direct supervision. Take out with any change in activity -- waking up, drinking, playing, eating, chewing. Do not assume she will show any sign. Only when she has done business outside does she get a crate-free time. My dogs know to squeeze out SOMETHING every single time from this practice. Very useful before class or before the car or whatever. When my adult female sheltie came she was trained well but didn't know to do something every time we went out (I call it opportunistic peeing -- I give you the chance, take it). So we learned peecookie. You pee, you get a cookie. Worked for her. Now she pees on command like the shepherd.
I no one shouldn't be angry, rub nose in it, or punish, but there were only two times my boy had an accident and both times we yelled "nooooooo!" And my husband added "What's wrong with you, you know better than that!" Just the harsh tone was enough for him to be scared of an accident in the house again and drive home the point.
Keep at it. Don't assume you have a lot of time. There was a window about 3-5 months I swear I went out every 20 minutes with the pup.