I totally agree... call 911, have them take her into the hospital, and refuse to bring her home until the necessary procedure is done. There has to be some neurologist on call that can do the procedure. just tell them that you can not deal with her at home. That it is not safe for her to be at home. Be firm.
If she is that bad now, she may not come back 100%. They are right to be scared that they totally missed the diagnosis. The longer she stays in this state the less potential for recover she will have. Did the neurologist give you a date for the surgery or just leave it pending? At this point I would want a new neurologist regardless. You don't just leave somebody in that conditions when there is a simple procedure that will help them... and then send them home to wait. You are right.... what a mess!!
Love, deb
PS.... I have actually sent Mom back to the hospital with Dad after a discharge. The night she took him in with a suspected stroke, the MRI didn't show anything so they sent him home. He couldn't walk either. I sent her right back to the hospital with him and called saying she could NOT take him back home. I arrived in the early morning hours. They had readmitted him and we later discovered a massive Xanax overdose. Nobody had bothered to do a toxicology on him. He ended up staying 5 days to clean out his system. Oh, and he got a new doctor as well. So it is doable