King price insurance are deceiving if not careful.

I have had the worst experience with King price insurance after having insured my car with them. I spoke to king price consultants to cancel my car insurance cover because I could not afford to pay their high premiums. The consultant tried to offer better deals but i insisted on cancelation. Instead of canceling the cover as being told. A month passed without deducting, then second month debit order came through. By that time, I had already joined another insurance company. When I request a cancelation latter, it's dated a month after I have joined another insurance(whereas they were not collecting money from me). How can the covers still be active when someone has not paid or even worse, has being canceled? Isn't that they say no premium No cover?. They use this phrases when it suits them. I demand my cancelation letter to be dated the day spoke to their consultant bcz that's when I canceled the cover.