Bad and unreliable service

On Monday 27th Nov, I had a meeting with a Sales rep from ADT called Stephen. I signed an agreement for installation and was told that my alarm would be installed before the end of the week. I informed him that it has to be done this week as I was traveling the following week. I called Stephen on Wednesday to ask for a date and time for installation. He said he’ll come back to me and once again assured me that it will be done before the end of the week. I called him again on Thursday and he simply ignored my calls. I then called the office and was told nothing has been arranged with the Technical team. I then called Stephen again on Friday, 1st December and he informed me that he was on the way to the office and will call once he’s at the office. By 11am, still no phone call, I called the office and was told they will only make an arrangement for installation on the following Monday. Again, I explained that I was traveling and hence the agreement with Stephen was that this is done this week. I am highly irritated. Stephen is ignoring my calls. This service levels at ADT have really gone to the dogs!!