Frankly, as this is a person who suffers from a number of disabilities, I believe that the kindest and most appropriate thing to do is to write it off as a loss.
She clearly suffers from psychiatric disorders, and the "unnecessary" plastic surgeries are a symptom of that. There's a lot of blame you are putting on someone who is sick.
It is kindest to her, but it also kindest to yourself. You are actually maintaining the relationship by trying to collect what you think she owes you. It's not healthy for either of you. You must be very angry with her that you want to keep this going.