Irregular Consumer Practices

I bought a car in November 2016 that comes with 1 year free Insurance as this insurance was coming to an end I was doing my research and getting quotes from Insurance companies that would best suit my pocket. I called King Price in October 2017 to ask for a quote and because I said I was happy with the quote I guess that meant that I agree to take their insurance. I was surprised that they deducted the premium on the 25th of November 2017 as I did not get a receive a schedule or take my car for inspection as other Insurance Companies do. I went to my bank and reversed the money they took. I have been getting sms after sms telling me that I should pay the installment. I wrote them an email saying that I cancel the insurance (which i did not agree to take in the first place).Today on a random Tuesday 12 December 2017 they decide to deduct money in my account. I have no idea who they told that they were going to do that but I guess that's how King Price does business. I now have to pay bank charges for unpaid transactions. I am really unhappy with the King Price