over billing by means of debit order

in September 2016 I took out a bond with ABSA and indicated on my application I do not require house hold insurance, I received confirmation of cancellation from ABSA, however the bank continued to deduct insurance premium since inception to day.

I took this matter up with ABSA and nobody can assist my with my refund, I have and numerous call and no positive response to resolve my matter.

ABSA BANK is good at deducting my monthly debit order BUT not good at refunding the monies owing to me.