Quantum Alarm Failed to honor sales rep's promise of military clause Corpus Christi, Texas

We signed an agreement with Quantum Alarm in December 2007 and were told that a military move would definitely nullify the three year contract.  I obviously share blame for failing to get it in writing, but assumed that these days most folks are military friendly.  I just tried to cancel three months shy of the the three year point since the military moved to Rhode Island and the Quantum billing rep did not care about the sales rep's word.  The "offer" was that I could just pay them the final three months in lump sum...great deal.