Cancellation of cover

In mid-July 2017, I had realised that Mi-Way car insurance isn't the suitable insurance for me to utilize after a heated argument that I had with one their staff members who continuously told me that it's my fault that they cancelled my cover due to the fact that they didn't receive my prorata payment of changing day time parking. Their consultant hadn't even told me about the date of debit. Anyway I was just surprised that their policy takes main priority in 1st saving their back by ripping away their cover the same day that they don't receive funds from the bank. They then SMS you 3 days later to tell you: sorry you are not covered. I then tried to negotiate a way with them so that they can get their funds immediately, they gave me another debit date and had the sufficient funds in my account. I never saw any debit going off and with consent I called to find out what's happening and found out that I wasn't covered for close to a month even. I couldn't take the attitude of their staff members who continuously told me that I was at fault period. I told them to cancel the whole cover, but instead that hasn't happened. They instead just find pleasure in debitting my account every month and I have to reverse the transactions every time. I emailed them last week to tell them to cancel the cover once again, but instead I didn't get any response. I am quite sure that at the end of the month they will debit my account once again. Can someone just please get Mi-Way to do the right thing and cancel this policy