Netstar has no customer service

It has taken 8 days and counting to get a cancelation done. I have contacted the call centre, written to their customer services email and posted on Messenger. Admittedly I did get a call from a lady to say they waiting for the insurance to delink the tracker. I asked her what insurance as the car had been sold and insurance cancelled. She couldn't really explain but just said she's waiting. She did not give me a reference and I have had no further contact. So once again the consumer is paying for a company's inefficiency. Could someone please help me out to cancel this service.