I don't know if reviving her is an option at this point. Your main issue appears to be lighting. Sunlight from your window isn't going to cut it unless you can provide at least 8 hours of direct sunlight via windows. Also the soil will take longer to dry, so don't water until the soil is thoroughly dry. Otherwise you risk suffocating the roots. Feed with fertilized water and pray. Also get an LED light or something else.
Good luck!