Cancellation

I called in November 2015 to cancel my tracker as I sold my car. I did not take the details of the person I spoke to. Netstar has continued to debit my account and I returned all the debits. I started to get sms's to state that I need to pay or I will be blacklisted. I then called the call centre, spoke to a Supervisor who not only tried to sell me another policy, he was not interested in my complaint, he was not empathetic at all, kept on talking while I was talking, he was more interested in telling me there company policy and you guys have a 30 day notice period. The more I am telling I am aware of the 30 day notice and it's more than 90 days already, he says there is no notes on the system or record on the system to say I called. He says I am at fault as I am supposed to take the persons details down. He promised to get back to after i spoke to him yesterday, yet still no call. He made me feel like i am at fault. Is this the type of service you guys offer and is your calls not recorded?