Bad Service

My problem started when my tracker unit was deactivated and I have never receive any call info me about that the tracker is not working. I called them in April/May asking where was the vehicle is at and their told info within 3 days bt to get any email after 3 weeks and been info the that their can't locate the device and I have to pay R395 to reinstall the device and I told I want to cancelled.This week that got sms from the attorneys that I need to pay any over due amount and I call tracker and been told I have a 3 year contract with them with I don't even know about it.