Dishonest practice by One Plan car insurance

I am so unhappy with One Plan car insurance,Gregory Dubazane was my agent who assisted me with a quote for my car,he did the quote,and apparently forgot to put the name of the Estate i live in,and then when the documents were sent only the name of suburb was indicated twice and I was given a premium of 1196 for a 25% access and then the filling day somebody else calls me to take the name of of the estate I live in and my premium jumped from 1196 to almost 1700.And when I asked to speak to the manager she said she would escalate it and what she did instead was to send me another policy schedule with a revised premium.Now it doesn't make sense why I am being punished for their incompetence and why does a premium that was quoted based only a suburb suddenly jumps with about 500 rands by just including the name of the estate which was still not captured in the second policy schedule.i don't have cover as we speak as I don't even understand if the pro rata I paid guarantees me cover after the premium was suddenly increased after signing up.i feel ******* into taking a policy that's not gona work for and thats gona b expensive for me,they are operating like amateurs and ****** I'm so disappointed at their service and seriously considering canceling a policy I don't even understand provides me cover or or not