Refuse to refund as promised

On 12 May I took out a travel insurance for my trip to Zimbabwe scheduled for 26 May. When buying the insurance telephonically, the purchase conditions were read to me. I was told that if I would like to cancel the insurance, I could do so right up to the day of travel, and I would get a full refund. On 22 May I cancelled. I have written 8 emails since, and still no refund. Could you please follow up on this?<br> <br>