Personal Loan Debit order date changed 1 month after request = DOUBLE PAYMENT

On 1 September 2020 my personal loans deducted double payments which is placing me in financial difficulty. I have requested debit order date change on 7 July 2020 to be changed to the 1st monthly, where agent made incorrect request and debit order change request was declined on 12 August 2020. On 22 August my debit order date was only changed to the 1st of every month, which resulted in double payments from 1 September 2020 which I cannot afford. I feel that Absa as my bank has failed to assist me as their client, as I have done my part to change debit order date early in July already which was not done. I hereby ask that my personal loan accounts be adjusted accordingly and that my savings accounts gets refunded accordingly as this was not my fault.