Netstar Customer Comunication Sucks

Since I bought my Kia November 2011 I contacted our nearest Netstar on Port Elizabeth to fit anti hijack facility as well as tracking device. I was still working and want assurance traveling between Uitenhage and Port Elizabeth morning and afternoon I have them backing me if I get hijack etc. It worked wonderful I was contacted if my alarm went of. I stop working at November 2017. Officially stop end of June 2018.i kept my tracking activated it was a minimal amount to pay. One day I got a phone that my installment increase and it was fine. I told them I felt safe with anti hijack installed in my car. Then the agent said oh that facility don't work anymore. I was shocked that they never let my know by email. February I contacted them to Cancell my contract as I was going to sell my car. I was told I am on new contract and owing the an amount I don't have. I had second thoughts and don't want to sell my car and will keep tracking. To my shock they took this huge amount from my banking account. I don't work I don't have that kind of money. I contacted them twice telling them if I sell my car I will immediately Cancell contract and pay R1054 which I need to pay as I have a contract. They did it again taking money off. I am now really angry and frustrated. They ignore instruction I emphasize to them. I will never promote anybody using Netstar. Their costumer service is non existed. When I google Netstar I saw many customers complain about same problem.