Pathetic Service

My Land line have been a problem for months...... Every time I log a call, if they do pitch to fix it they take forever and the line works for a few hours and then the same as it was. I am extremely tired of this. the reason for me even bothering with this useless service is for my alarm purposes which is now not working at all. I have logged a call a week ago and no technician was dispatched to tend to my problem. my question is so why am I paying? Does this mean that if I stop paying they will call me to say I owe them? I have Just logged another call and the agent said she will escalate to who? !!!!