POOR SERVICE THAT LED TO THEFT

The guys from Adt were suppose to come through to put beames last week and no one came out,We made several attempts to get a hold of the technical department and accounts department but we were on hold for over 10 - 15 min, We also made several attempts to get a hold of the Rep that assisted but couldn't get through(no answer). On Saturday 27/07 my mother in law had an intruder in their yard and all her pipes were ****** even though we requested a door beame the pipes were right by her door hence this could have been prevented. PLEASE TELL ME WHO WILL TAKE ACCOUNTABILITY FOR THIS.