Do I have any recourse with Vivint to cancel my account.

Vivint salesman told my wife that we could cancel with valid ETS or PCS orders. Now, a year later, they are refusing. My wife signed the contract for me (I never wanted the system), even though she did not have power of attorney (I was deployed to Afghanistan at the time). The salesman told my wife to lie to the installers and tell them we owned the home. When my wife began telling the installers we actually rent the home, he stepped in and reassured them we owned it. My wife felt uncomfortable standing up to him, and let it go.