Worst Service ever!

I have been trying to cancel a HOC Policy for a client since 21 July 2023 (reference number ***7) and I follow up every couple of days, but no one has even acknowledge any of my emails. I send it to Complaints as well on 1 August 2023 and not even them got back to me. What am I to do? This is such bad service. Very upset about this. Regards Elnita Bruwer