Matrix Customer Disservice

Been a loyal Matrix customer for many years. I bought a new car and tried unsuccessfully for 3 days to get anyone to answer in order to arrange for a new unit to be installed; I even pressed the yellow "assistance" button to no effect or response. I therefore changed tactics and called, mailed, and used the chatbot to cancel all three my existing vehicles. I received a mail today offering absolutely no apology nor any offer to try and remedy the situation, only a brusque notification that there is still some months for the contract to expire, and I need to pay that to end the service. Likely the absolute worst customer service I have ever received, the complete impersonal and disconnected "couldn't care less" attitude is probably the worst of the whole sad episode.