Don't want to close account

I Have registered for debt review in July 2015 and asked the day I have opened an savings account for my debt review to close my cheque account FNB did want to close the account as I had a loan and credit card on the cheque account now my account stand at more than R2000 in arrear because of banking fees still going off every month and I have asked numerous times to close the account now FNB expects me to pay that money before they close the account. I took out a Legal policy with FNB the 25th feb 2016 and told the person that helped me to debit from my smart account and he did not listen and they debited from the cheque account now unpaid debit order charges also added. its not my fault and they can listen to the recordings as well. please assist I have been a loyal customer and really getting tired of this