Matrix service

When they installed the first tracking device I was absolutely amazed by their service. When they installed the second device (upgraded??) they didn’t even take out the first device. They didn’t even give me a remote to manage the system. When they deducted the first premium after the “upgrade “ it was suddenly about double the previous premium and on the wrong date. I immediately informed them that I was unhappy with the situation and that they should cancel it immediately and come and remove their two devices from my vehicle. After about two weeks and numerous phone calls and emails, they sent me an email informing me that the account has been closed as of 27 December 2024. I have been debited again after that three times and they keep on hastling me about outstanding payments for January, February and March. They don’t respond to emails (I’ve sent about 10) or telephone calls. This is the worst service I’ve ever received from any company.