When you KNOW something to be true and someone else doesn't
  listen to you... it's very very hard to handle. I find myself
  explaining something 10 different ways, 20 different ways,
  whatever it takes and TRY not to lose their ears.

  Once someone grows deaf to me, there's not much i can do. And
  it's hard. While I don't know the specifics of your situation, I
  can relate in my own fashion.