At what point do you tell the ex-fiance enough contacting me?

Alright, this is more of a vent than anything and I usually just write something like this down in a journal and save, but I'm beyond annoyed. My ex-fiance and I ended things while living together early in October. I haven't spoken a word to her since the moment it happened. She loves playing this game where she thinks I will beg, plead, and grovel until she gets an apology on her terms. It was just a complete disaster living with her. She was obnoxious, obsessive, and unruly. She let her idiot 19 son and his pregnant girlfriends move in and take over the house. I have a home office and paid all the bills and could quickly see how bad things were going. So, I am not pining over her, or looking for a way to contact her. I can't talk to her with a level head anyway. She will constantly try to get me to engage her with stupid questions/comments all the time. One day it's I don't trust you because you had friends that are women from years past you talk too, and the next it's I love you even though you hate me. I haven't responded to any of this constant communication, but tonight I got a random question about some computer issue. I shook my head with disbelief that she thinks we are going to be friends or casual conversationalists after the way in which she's behaved for far too long and affected my life and most importantly that of my children. I gave up our home of 5 years to blend our family in May. So in 2 months she claimed she made her own decision she didn't want to marry me, but waited for 2 months to tell me on a random Thursday at 10pm when we were watching tv and getting ready fro bed. That's fine and I could deal with that in its own way, but once I left to get away before moving she writes idiotic texts about poor her and how she is hurting. I don't care one way or another, but I guess my problem is I am expecting a mature text one of these days about how her decisions were selfish, irrational, and wrong. Kinda selfish of me to expect that, or maybe it's wishful thinking. I should have made it clear when I moved out to never ever contact me. We were together for about 3 years total and I've never been so happy to get away from such insanity. Most importantly, I can see the smile and carefree attitude in myself and the kids back. Anyone gone through something similar?