Bank allowed wife to extract money from my personal Acct using an expired power of attorney?

I'm deployed overseas I set up a private bank Acct due to my wifes reckless abusive spending it had gotten so bad that even the bank teller frowned at the withdrawals that she was making but they continued to allow her to withdraw money even though I asked them not to do so; there excise was that she has a power of attourney , they didn't produce a copy to show me neither did my wife show a copy ; I did grant her power of attorney in 2008 in June the statutes doesn't exceed one year however the separate Acct was opened in 2010 the power of attourney should have been invalid when I questioned the bank managers who allowed this to happen they refused to admit there mistake and continue to allow this to happen even allow my wifes mother to write checks on my Acct and forge my name then write letters stating that her daughter told her to do it.