Dont try to do good by yourself by actually paying your debt

I called ABSA credit today to request and amendment to my debit order for the month of September and only the month of September to the amount payable as shown on my statement as I pay extra on my installment monthly. The call centre agent who was very friendly and efficient, took me through a list of reasons why I cannot do so and what is required to do so just for one month, proof of insurance, FICA docs, list of expenses, everything short of a blood sample too. She suggested I contact the collections department to assist but all this does is say I cannot afford to pay, which I refused to do because that was not the case. She then asks someone else who advised it can be done but then it will remain like that for the remainder of my term and all the interest since the time I increased my installments will be added onto my amount. Like how is this helpful to the client and how is this TCF compliant? I am so upset with ABSA because all I wanted was for the amount to the changed to the amount payable for the one month and then changed back for October, but this is not made easy for a client who has been paying back well to ABSA. I certainly will never use ABSA as my bank for finance or any other reason again, mind you this was not a choice, I had to because of the car I bought and where I bought it from. ABSA has certainly left a bad taste in my mouth due to this unpleasant experience.