Nationwide Security Solutions Inc. allowed someone in my home to sign my name Vancouver Washington

this company came to my home i was away at work and they installed their security system not checking if the people that signed for it really lived in my home or just visiting. after they installed it someone signed my name and now they have been tryiing to bill me for this when i did not agree to their contract because i was away at work. i have called multiple times to try and get this resolved but they laugh and lie about not kowing who the owner is and hang up on me. this had went on for months and they said they would be getting back to me and never did no letters just bills no calls from the owners and now im done i want them to realized they screwed up and allowed someone to sign my name i cant say if they were really even scheduled to install their security crap. no one know. how are these people getting away with this.