Bad customer service Absa. In competent employers.

For the last 4 months Absa call center agents contact me regarding loan account that is in arrears. I went numerous times to my branch and instructed them to change the debit order date the the change in salary dates and they never changed. Every month I must explain the same old story. I also instructed them to connect my rewards to my cheque account which the never did. I'm going out of my way to fill my car at sasol buy most stuff at sasol under the impression of receiving my rewards but they never did that asswell. What should I do as I feel Absa consultants in very ***********.