Netstar has the worst customer service

Recently had a unit fitted in my vehicle, received the certificate that its active. A week of trying to call them to advise that I cannot see the vehicle on the app that was downloaded x3 times. Called the call center for days and was unable to get through to customer service. Only to find that the device is not working so they will have to send a technician again? Imagine paying for a service that has not been used. When you want to cancel you have to deal with rude agents. I'm going back to tracker, Netstar is the worst!!!