Disappointing Tracker service

For the past few years I've been trying to cancel my subscription with Tracker without success. The car is no longer in use and every time I call them they either keep me on the line too long and eventually when they answer they refuse to give me a reference number for the call.

The agents keep on saying they have forwarded my request to their cancelation department, but the cancelation never happened instead I keep on receiving monthly bills from a noreply email.

This is very bad service. Disappointing