Another day without my daughter

It's being cut off completely that is so hard. It's been 13 months since I last saw her - the day of her graduation from University. I never thought it would be the last time I would ever see her face to face. She went to England for the Winter and told me that she was coming back in April... she didn't return until July and then made every excuse to not see me. I tried to meet with her many times. She won't respond to my emails any more (that was the only way she would communicate). I really don't know what to do any more. I've written letters, left voicemail messages, sent emails, sent text messages to her phone and nothing.
I wish that I could see her at least one more time just to talk about why she wants nothing to do with me any more.