FNB is incorrectly debiting my account

FNB is incorrectly debiting my current account. I have recently became unemployed and I have personal loans with the. My insurance is paying my monthly premiums towards the personal loans however, FNB has not suspended my debit order and they are also collecting premiums from me. This means they get premiums from the both the insurance and myself.

I have attempted to stop the debit order with them however, I have not been able to get assistance. I'm frustrated as we are heading towards another month end and I already know I will have to deal with the same issue.