continuos debit order on my account

On the 16th of September I went to avbob hezyview to make a paid up on my policy, they assisted me nicely also being told the amount I'll receive in case any of the person in my account can pass on,and I also asked if the debit will stop they said they stopped it,now I'm seeing a debit order on my account, I even reversed it but it came again for the second time and it affect my credit scoring.now the bank is sending me notification saying I should fund my account,because it affect me too much when I keep on having bouncing debit order.a