Lies lies lies to retain clients

I canceled my insurance and FFw refuses to refund my premium.. Their call centre agent insisted that i cannot get my premium back. He also tried to retain me by telling me a million lies pathetic! My insurance premium went up by R400.. Apparently this because of inflation.. I haven't claimed for the car at all yet my insurance went up by R400.. I then ask for a review to keep my premium the same or a little more fair enough it was brought down to R1475 etc.. Knowing that i have shortfall cover for R280. Back to R1700 ok clearly this is better than the R2074 i would have had to pay.. Long story short i need my refund for the month of June as i am definitely not covered by FFW seeing that my insurance was canceled on the 10th. I have paid my premium on the 26th of May for the month of June.. If anything were to happen God forbid this same FFW will refer me to my cancelation letter so can someone just do the rightful thing and give me my money back.