Absa *****ing my little money

For 3 months I have been trying to change the debit order date. Numerous calls and emails sent from pillar to post yet, Absa has debited my account twice, including original debit order dates as well as newly requested debit order dates. As explained my date of payment from my employer has changed LETTERS emailed to confirm, yet you debit as you please, leaving me with unforeseen bank charges. Why do you have people working at Absa if they do not have the necessary skills to assist customers? I need Absa to contact me urgently and reimburse the unnecessary bank costs ABSA incurred. I have no other choice than to cancel my debit order.