My exnh is definitely psycho!

My grandmother is 91 and in the hospital in very poor health. She was one of the people that exnh had fooled. She is finally realizing his true colors. So, he called the hospital today, knowing that he shouldn't. My mom (who saw his N-ness before I did) answered the phone. She asked me to email him and tell hm not to call again, as noone wants to talk to him. Here is what happened:

my email:
My grandmother is too sick to deal with you. Refrain from calling her, as your calls are unwanted and cause undo stress that neither she nor anyone else in my family needs. No one wants you calling.
DO NOT CALL MY GRANDMOTHER AGAIN!

So I get a text a little later:
I can talk t whoever I want! It's really none of ur business! The only people who dont welcome my phonecalls r u and ur mother! (Grandmother) is a good friend of mine, always was, always will be and theres nothing u can do! So go ahead and write ur letters to my lawyer! Everyone needs a good laugh! Cause u dont always get what u want! Stop being childish! I think ur a little old for that, but if u must go right ahead!

OMG!!!! I just want to go smash his stinking face in! My grandmother does NOT need this stress and neither does my mom, her only living child left!!! Nor do I!!!! Can I get a restraining order or something??? She does not want him calling! What is it gonna take??? How can he be so fricking stupid as to ignore the wishes of a woman who may be dying??? And the family? I am so ticked off right now I can't stand it!!!