Terrible Service for replacement of tracking device

On Friday 30th May, I called to have my tracking unit replaced as I have purchased a new car and no longer have access to the car which previously had a tracking device. I was told that I needed to make a payment and that on Monday the 2nd of June the technician will be in touch with me and come and replace my unit. Today is Monday the 2nd and at around 11 no one had contacted me, I called the customer service line and the lady who helped me promised to get back to me regarding the technician coming for the fitment. No one called me back I took it upon myself to call again after a few hours and she apologised saying she had been busy, she gave me feedback that the technician was still busy in town and would make his way to me as soon as he was done. At around 16:30 I called again to find out if the technician was still coming and I spoke to a gentleman who said he would check with the technician and will call me to provide feedback. It is 20:17 and it’s clear that the technician won’t be coming. It is annoying as I had to ensure that I cancel my plans for the day to ensure that I am available for the fitment. I have been a client for a long time and I find this kind of serving appalling, my time as a client is not respected even though I paid for this service. Clearly Matrix doesn’t value it’s clients, I as the client cannot be chassing Matrix to fulfill a service that has been paid for.