Complaint and bad service

Ever since installing a Cartrack system in my car in May 2018 there's been problem after problem. The first problem after installing the Cartrack system my dashboard lights went dead, they sent a technician (CFWC036) to look at the problem, all he told me was some of my dashboard bulbs have fused. I told him that everything was working well in my car before the installation of their system but he didn't take note of that and the problem was left with me to fix , they didn't take any responsibility at all. Yesterday, 07/05/2018 their technician was sent over because they said the Cartrack system in my car was not updating. The technician spent almost the whole morning fiddling in my car at the end he said he changed the system and installed the new system. This morning, 08/07/2018 when I tried to open my car bonnet wanting to check the oil and Water I noticed that the lever that I need to pull to pop open the car bonnet was not there. I searched everywhere, the Cartrack technician has took it off when he was fiddling in my car yesterday. I can't open my car bonnet. Immediately I contacted their call centre around 10am on 08/07/2017 and I was told to call again on Monday by the lady who answered my call and who refused to give me her name. When I asked her who is going to be responsible if my car happens to heat because it ran out of water of oil because I can't open my car bonnet due to their technician incompetency, she told me that there's nothing she can assist me with, they don't have technician working on Sunday. Strange enough because the technician that came when I reported the problem with my dashboard lights came on a Sunday morning and today I am told that they don't have technicians working on Sunday. The name of the technician who came on Saturday 07/07/2018 is Marcelo, his code is CFWC045, he is the one that removed the lever in my car to open my car bonnet. I regret installing the Cartrack system in my car because ever since their technicians have installed the system in my car, I have experience problem after problem with Cartrack. I really regret. My username DYWI00048.