Is it wrong to walk away from a person who suffers from repeated medical emergencies due to their own irresponsibility?

Over a year ago, I was the tenant of a type-1 diabetic who refused to eat properly. As a result, I regularly had to call the ambulance for her, as she would allow her blood-sugar to drop to dangerous levels, such that she couldn't think or move for herself. She never learned anything from these experiences. She never put emergency food within reach, for example. So a few days or weeks later, I would have to call the ambulance again. I believe that I was being forced -- literally -- to take care of her. I feared that I'd face manslaughter or other criminal charges if I left her alone in that state. Would it have been morally proper for me to leave her in that state without any advance warning? Should that be legally permissible?