Trying to cancel policy for months now.

I'm struggling to cancel my policy with them for 5 months now and with all the paper work, I decided to be happy to lose money because the guy put my name on the data system without calling to confirm as promised. Not even a second letter to cancel my policy help...they are just sending over and over the same documents attached. They don't have a clue what they sending without looking into the policy of the person and what is requested. Going for 6 months now and still paying....they are taking forever to reply to my emails, 2 to 3 weeks everytime I'm sending a email. I even send my pay slips and received a message that it was cancelled. Now I get the same emails of case will be investigated of the first email. How on earth the double emails?? Someone there is messing around with the paperwork.I'm sick and tired of this now.