Endless Problems With Tracker

On the 18th March 2024 I had Tracker installed in my vehicle which didn't work and was replaced with a new device on the 20th March 2024 which also did not work. Then on the 3rd April a third device was installed check out by the technician and registering while I was at the fitment centre. On friday the 19th April. I used my vehicle and that night around 23.16 thought I would check if it registered my mileage so I went on the app and it said the vehicle was moving and behind my registration the letters where NW with NO phone call from Tracker to says my vehicle was moving. I went downstairs to see if my vehicle was still parked in my bay and I pressed the emergency button and got No response from Tracker. I then made 4 phone calls before someone answer my call and was told to phone another number. This person then says if there's load shedding or NO wifi connection the Tracker wont work and that he would get someone to call me Saturday morning between 09.00 and 10.00 which did NOT happen. On Saturday morning I called the fitment centre at 10.30 and told them I want the Tracker taken out of my car and the contract canceled as I have had enough of Tracker. The fitment centre spoke to someone at Tracker and they told her they are not busy and would call me before 12.00 which also did not happen. on Sunday the 21st April 2024 I was going out and switch on the vehicle and on the app it didn't register that the ignition was on so I pressed the emergency button and waited 10 minutes with NO phone call from Tracker so pressed it again after 10 minutes and still No phone call. I then got a phone call from my sons wife in Cape Town in a state of panici to hear if I was ok because Tracker had phoned him and I live in Gauteng and I am the driver of the vehicle not my son in Cape Town. This morning the 22nd April 2024 I got a phone call from a lady in the call centre around 10.50 wanting to know the problem .I told her that I want this problem to be handled by management and she said she would get management to call me which also has not happened. Yesterday I thought I would look where Tracker put there device and clearly if you follow the new black tape you would find the device. I am a 78 year old woman and I don't need this type of aggravation in my life. I want the device taking out of my vehicle and the contract cancelled ASAP.