Poor Customer Service

I'm very disappointed with the service rendered by Netstar. In March 2024 I called in advising them that can they please send me a consultant or rather can I come in one of their around the Eastrand so they can remove the tracking device on my vehicle since I'm going to be returning the car back to the bank. And a consultant advised they'll send out a technician to come remove the tracking device. After calling hours later a consultant called and advise if I was okay because on their side it shows that someone is tempering with the tracking device I confirmed I'm fine and I'm driving the car there's nothing wrong. I than advised the consultant that can they please send me a technician to remove the device because I'm returning the car to the bank, he confirmed that all will be sorted since I said I did called in and notified them. On the 11 April the car was returned and there was no technician sent out. Now I'm being harassed by Netstar lawyers demanding payment of which I don't have a problem paying BUT I can't pay for something I don't have. So please if they can go de-install the device and deliver it to me than I'll make payments until the end of my contract.