Matrix trying to **** clients

Honestly irritating customer service. I changed vehicles 3 months ago and contacted Matrix to cancel my existing tracker month to month contract and they can come and install a new one. Matrix came through updated all my details, new vehicle and installed a new tracker. But somehow they continue to debit me for both trackers. I reverse the second tracker payments because I cancelled the service. They then call me 100x a day to find out why I haven’t paid, I tell them the issue is on their system. Whenever you try calling them to follow up on whether they have resolved this issue you’re put on hold for 30 minutes with no answer. Terrible service. These companies never want you to cancel a service. It’s a very quick process to take up a product. When it’s time to cancel all of a sudden their systems don’t talk to each other. Personally I’m tired. One more call from Matrix about a missed debit and I’m telling them to come uninstall their new tracker as well and I’m finding a new company.