Pathetic Service

Changed 2 vehicles asked for new devices into new vehicles. 1 year later I at last got a response. Still trying to bill me for vehicles I don't have and keep trying to run debit order even though they are aware of the situation and services are no longer required as I want to cancel all devices due to pathetic services but every attempt is being made to not cancel. Now I am being threatened with credit listing and lawyers. I would never trust their service or recommend them as if the basics eg admin cannot be done correctly what can we expect if there is a car ******??