Not able to reverse and stop ********** debit

I went to a capitec branch to cancel a ********** debit order that shows Clintelle life in the description. I was told that they are not able to reverse and cancel this unauthorised debit order. This is nonsense how did capitec approve this debit order without me approving it? This is worse now that they are not willing to help me cancel and reverse it. So this means the ********** will keep on debiting my account. Yohh capitec. resolve this or my only option will be to leave capitec.