How to deal with it?

Hello, I am a new grad nurse who recently received a job offer one of the hospitals in new york city. The manager of my unit called me last week and said she has to give this opportunity to the candidate who applied internally (obviously that nurse applied later than me) because the nurse has been there for 15 years and she is afraid that she is going to fight for the position (union). I called the recruiter and she told me that she is going to find out what exactly happened and called me back. Several days without getting a call back from her, I called her and asked. She told me that she now knows what happened and she told me that she is going find another position for me.
I waited and called her this afternoon, she was so rude to me and told me to call her back around 5 pm. I called her around 5 o' clock and of course, she didn't answer the phone! I am so discouraged at this moment because I waited so long for this position after another offer has been turned down due to hiring freeze in this area. Any comment is appreciated.