PROTECTION PLAN BEING CHARGED WITHOUT ACKNOWLEDGEMENT

For the duration of my loan, African Bank has been charging me for the insurance protection plan, i recently queried this with them anf fwded them all the documents they required, it has been a month now, no one is responding on the way fwd... it is quiet simple... I HAVE LIFE INSURANCE AND HAVE PROVIDED MY POLICY TO YOU, I NEED YOU TO PLEASE REFUND ME FOR ALL THE MONIES YOU HAVE BEEN DEBITING ME FOR THE INSURANCE, NO ONE ASKED ME TO SEND THE DOCUMENTYS THROUGH AND ALL I WANT IS MY FULL REFUND PLEASE