Get Mr Number: I call it my codie app, very useful for no contact: it blocks calls and texts and you can chose the settings (hang up or straight to voicemail etc.)
here is the link
https://play.google.com/store/apps/d....blocker&hl=en
Oh and the price is right: free LOL
Are you going to Al Anon or Nar Anon? Give it a try, Al Anon really helped me.