Disputed repair deducted.

From the second day Cartrack installed the device and I unlock my vehicle in the morning I receive a alert and a call from cartrack. After 5 days went back to service centre and they fix it However after two calls where I disputed Cartrack for charging me for a device not working properly they still charged me. After visiting the service centre twice I still have not been refunded. I have two cars with Cartrack and will tomorrow request them to remove one device and the second one will follow soon. Cant do business with company that just take your money and that dont want to and will not refund you.