Paying Netstar for nothing!

I have had a Netstar tracker installed since 2009. The only interaction with Tracker over these 11 years has been the monthly debit order. My husband called Netstar 2 months ago for a quote to have a tracker installed in another vehicle. However, he was advised that the current tracking system needed to be replaced every 2 years to test that it was indeed functional. Nothing of that sort has happened! The lady at the call centre advised that a someone from the customer service/technical department will contact us however no one has done so to date! Thereafter , i cancelled the Netstar debit order because i moved to another service provider. I now see that Netstar has re-instated the debit order! Please cancel the debit order with immediate effect and review the need for my premiums for the past 11 years to be refunded since theres no evidence to support that this device was actually operational given that no one from Netstar in all these years contacted us to test the device.