Early warning tracking system, useless.

Our vehicle was ****** and on reporting it to Bidtrack 10minutes later, we were informed that a jamming device is being used to block the signal of the tracker, so Bidtrack could not pick up the signal. 1 Hour later the control room called to say that they found the device, but obviously, no vehicle. My insurance forces me to install an early warning tracker, when the normal cheapies have a much better chance!