No response from Tracker at all

I emailed Tracker 02.09.2015 and 16.09.2015 and phoned them and still do not get an explanation or any response in writing.<br> <br> Debit order 01.09.2015 went through for much more than it should and no one can explain why. <br> <br> Telephonically they explained that it's because I booked a service call. Yet they contacted me saying the unit was not working. No one informed me that there will be costs involved. I am waiting for proof that someone informed me that there will be costs involved.<br> <br> I want to cancel all services with Tracker. I have been with them for more than 10 years and this is no good service just adjusting the debit order with no explanation.