Double Debit and Slow Service

I made a request to change my Debit Order for the personal loan from 26th to last day of the month at ABSA Branch (Centurion Lifestyle) in March but this change was never effected for two months the debit happened on the 26th with no enough money in the account. On 26th of May I went to the same branch to resolve this but I told the ABSA employer responsible for this never followed up on the application and apparently sent things to the wrong place so it was not done. Due to this the debit bounce twice and I incurred charges due to this. On the 26th i requested the normal debit of R2703 be cancelled and R3000 at end of the month should be done but now I have been debited twice the R2703 on the 27th may and R3000 on 31st May. Can you reverse the R2703 to my account.