Three of my senior friends purchased an alarm system from ADT. They were not pleased with the service. They only had the service for a few months. Another Alarm company, Guardian, salesman sold them a new alarm system and told the that he would take care of settling the contract with the ADT alarm system. He told them he would take care of everything. To their surprise they were billed a monthly service fee from both companies. The new alarm company said they would honor the salesman promise and pay off the other company as soon as they receive an invoice from them from the other alarm company. Is it okay to stop payment of funds to the old company? These women are in their 80's on limited income.