Worst Service ever from Netstar Vehicle Tracking

My Netstar unit was installed in 2018. In 2019 I decided totrade my car in on a newer model. 2 weeks before the time I notified Netstar of the transaction and the said to let them no the day I receive my new car. I informed them when I received my new car and they said they would organise for the removal from the old car and installation in the new car. 2 Weeks later the Netstar operator phoned me and asked me where the old car was, which have already been sold to a new client, but I could see exactly where the car was on my tracking app. To cut the story short the tracker unit was installed in my new car a month after I took delivery. I requested Netstar to cancel my services and I was told that I was still in contract with them. So in January 2022, when I was sure that the contract have expired and is going on from month to month, I requested Netstar again to cancel my services as from the end of January 2022. Up untill today and many emails later it is still not cancelled and I received an invoice for outstanding amounts during February and March 2022. A very arrogant Netstar operator phoned me and asked what the reason was for me to cancel so I said that I dont need to give her a reason to cancel I just want the services cancelled. After the phone call I wrote an email to explain exactly why I want to cancel. I have sent numerous emails to the cancellation department to confirm cancellation but have not received any response. So if you ever think to use Netstar Tracking, think twice, never in my life have I experienced worse service than this. All our Company vehicles are tracked by Cartrack and we never had any complains.