Pathetic service and feedback

A complaint was logged on the 3rd March for a technician to come out. We were advised that a call out fee would be charged, I informed the consultant that this shouldn't be the case as the technician whom installed the system (outside beam) was aware of the fault and advised that we should contact him when this foreseen problem occurred. I then contacted the sale consultant Nigel on 7th March. I informed him that I am currently pregnant and have not managed to get more than an hour of sleep through the night as the alarm error pings continuously and the only way to stop it is to deactivate the alarm. We cannot afford to have our alarm deactivated due to the increasing number of burglaries in our area. <br> He promised my call would be returned within an hour. I tried calling back 7 times that afternoon and all my calls were ignored. I then called back on 8th March and he said that unfortunately the technical manager said that the beam was not under warranty. We brought this beam from ADT in August 2015. I asked Nigel what did the warranty have to do with anything? He said he would call me back on 9th March after their meeting at 11am. I have never heard from him since!