Pricelock billing

I received my pricelock decoder on the 23rd April 2018. Little did I know that accepting it will be making a deal with the devil. People warned me about their service and to go with netflix instead but I thought it will be different for me.last month i checked my billing and it was about R1800 but they debited R1130 and they told me its because it was activated during the month. Now this month again they debited R1894. I called their call centre 4 times and after being put on hold for a very long time because the manager was busy.the agent told me its correct and nothing can be done. When they sold me the product,they **** that its R950 but its a complete lie. I want my money back as soon as possible and they can come take their decoder and dish. I want to know how can I come out of that contract because its not what was agreed upon.