ADT Disappoints

Poor folllow-up on fault reporting, as well as communication between sales rep and technical staff. I have 3 premises with ADT, 2 were new installations. I ordered x amount of remotes, they come to install only 1 for a guest house? While there was 3 on the quote. Then the technician said that quoted amount of detectors were insufficient on quote. Every time the actual amount were more than the quoted one. Then the newly installed App did not work and they had to replace something on the system. At the other premises, we discovered by accident that the alarm is totally off during power outages. I reported that and had an appointment with a tecnician for the Monday at 10h00. ADT called and said that the technician is sick and that nobody else can work on it because he installed the system. I insisted on seeing the sales rep at least, and ordered 4 new beams that work wireless. I was promised that it would be installed the upcoming Thursday. I only received the quote on Thursday, I paid immediately and was the told that the appointment for installation was for Friday after Thursday, but that they don't have stock. In the meantime we had loadshedding for several hours each day, during which time we had no alarm. Only after calling a few times (whilst we were on holiday) they went to fix the alarm. In the end there was something wrong with the "board". Every time that the power came on again, the alarm gave a fault sign and they called me anytime of the night . Not ideal when you try to have a peacefull vacation.The beams is supposed to be installed on the 12th, 10 days after the initial appointment. The alarm system was fixed on the 10th only. 8 days after the initial appointment. During those time we had no alarm during loadshedding up to stage 6. I hope that they will at least keep their promise for the installation of the beams.