Forced policy

I had a home loan with FNB and have since settled it. Now they are forcinge to have policies that were attached to the home loan even after i have settled the amount i owed them. My life policy was R466 and R473 for building cover, i have never missed a single installment but they claim i must pay them a thousand rand extra on each policy. Its a condition for them to cancel my bond, i dont know why must i pay so much since i have never missed a single payment. I have tried calling them and email with no response.