change my debit order date

When I app**** for my loan, i advice Capitec Bank Alberton that my salary is paid on the 27th of each month. But they refused to listen to me, according to Capitec I get paid on the 26th. I went to the bank about 2 months ago. And advise the bank the debit order date is wrong. And it was not change, as they want me to go come back in with papers. When at first I told the bank they have the date wrong. My problem is that each month I get a sms my account is not paid. I need to phone *** to make arrangements for payment. I tried at 9:40. And no one answer thr phone. I need someone to listen to me and change the date. As soon as my salary is paid into my bank account the debit order go off.. Now this sms I get each month give me a BAD NAME for \late payment"when its not even my fault. """