I am a contract employee. Can the client - a mega banking institution - be held accountable for wrongful termination and removal from the account?

I am a 59 yr old security professional. I work for a security firm. I was contracted to a major banking institution and have worked exclusively for the top brokers at a firm owned by the bank. I escort the firms ultra high net worth clients to their brokers. Last Wed. I was told by my MD I had a stress fracture on my left foot. I was working in extreme pain. I stayed out Friday, with a pending foot surgeon apt on Tue. Mon. night, my security G.M called me to say I was removed from the account by the client because my Blackberry was shut off. My status that day was off without pay for medical reasons. I checked my phone several times. No messages. The man who released me plans to put a younger woman with a terrible work record in the position. My salary was $67,000/yr. I was employed in excellent standing for 2 1/2 years. No performance issues what so ever. I am a hurricane Sandy victim. Took 8 months to repair home. Continued working throughout the disaster but money is low