Chargeback MYOB

I am very unhappy that we still cannot remove the QR code from our invoices.  I've made a note that comes up on all invoices stating customers will not get charged a fee if they deposit straight into our bank account using BSB and Account number.   I have also cut a paste the charges they will incur if they select the QR code from MYOB that I cannot remove.  I have typed this note in capitals, as I cannot change colour or anything to make it stand out.  As people do not seem to read we still have customers paying this way.  I have now received a chargeback email from MYOB, stating that a customer has made a dispute with their bank and want this fee paid bank.  How can that come back to us when it is clearly a MYOB issue not mine.  Thank you for any assistance.