Unreliable tracking and no customer support!

So i have 2 toyotas with 2 units in each. However they are so unreliable with the app where you can monitor them. I stay in teh freestate and the one car is showing its in JHB but i literally see it in my yard. So got hold of support at cartrack and they said just drive the cars for a long distance then it will "reset" itself. But no luck i again send them an email with screenshots from the mobile app showing the cars in 2 different places. And best for last it shows in the one unit the car is white and othe one as silver. Its just sad that something insurance companies push for is so unreliable. And obviously no reply from the support team at Cartrack. At the end it will probably my fault if a car gets ****** as i did not make sure the units work correctly. But atleast i have proof that it was communicated to them and what they did about it is not my problem.