Policy not cancelled

I Requested ABSA to cancel my building/property insurance with them. I clearly requested them to cancel both my policies and supp**** both policy numbers. I supp**** copies of the new policies with Momentum which would replace my existing policies. They only canceled one policie and for the last 20 months I have been paying for a building insurance with ABSA that I would not have been able to use (should something have gone wrong) as I would be double insured.. I started with the complaint process, but am not getting any response.