I have interviewed for a position as a Human Resource Administrative Assistant, and I received a contingency offer depending upon my references and background check. The Human Resource manager called me and said my last supervisor "seemed extremely uncomfortable with giving you a reference, and she's avoiding my calls." And that is because I filed a wage claim with the DIR, in which I won. She gave me a high recommendation at the hearing but now her story changed to my would be new employer. She gave me a written letter of recommendation and I gave them a copy but they also wanted to speak with her. Can I sue my last employer for refusing to give a reference and by doing so caused the would be employer to be eerie about hiring me because she is trying to retaliate against me.