I think that she is very selfish to be on the phone to me again today, crying and sceaming, and trying to make me feel guilty about leaving her, and asking me to go back.
Its not gonna happen.
Stand firm then. You are done, let it BE done.
Lather, rinse, repeat.
"I hear your upset. I hear your disappointment. I am disappointed to. But it is what it is. We cannot go back. I am sorry."