Car tracker not working - new unit - new customer

Car had tracker installed 29.10.2021. Called them to advise that I cannot see the correct location of the car. It still shows where the tracker was installed, I was told unit is faulty. Someone would call me. It’s been two days. I called them now to test the location of my car ….. wrong location. Location given is where the tracker was installed. So I’ve been debited already but terrible after sales and service. Further more I would like to cancel this service and a refund be given. I would rather go with netstar. I’ve regretted this choice. And I had the tracker based on availability.