So disgusting service

I trusted Absa as one of the biggest Bank in the banking industry but never expected such a poor service and very *********** and unprofessional staff and very inconsiderate. For past 4 months absa is unable to change my banking details and update with new ones they can't amend debit order date,when I go to the branch they can't assist,they want me to call and they assist me over the phone but come debit order date nothing has been done for the past 4 months we are doing the same thing and I have to make cash payment.