service sucks, response time pathetic

Took my contract out last year, got charged for radio up front. 3 months later got charged again. Beams installed which have had issues with since installation, now pay everytime alarm goes off due to installation. Continously get promised by installer that he will come sort, but never arrives. Get charged irregular rate. Sent numerous emails to their customers service but no response. Speak to managers at call centre about issues and of whom will get someone to phone me. No response. They take between 20 minutes to an hour on alarm activation to contact you. Absolutely pathetic response and service. Surely they are in breach of contract for poor service.