Telkom - Affected my Credit Score negatively, while I did the right thing as a client.

I opened a new bank account and called all my service providers including Telkom to update to my new debit order account details. Telkom is the only company that cannot update my details as it have to be 3 months old. How do you expect clients that open a NEW bank account to keep open and pay for two accounts for three months - just for your ineffective processes? Even though I called twice to try and change the details my debit order now bounced since my old account is closed and this has now affected MY CREDIT RECORD!!!! Why are you the only company in SA that has this stupid rule!? What sense does it make when a client is trying to do the right thing and send you a notification early that they opened a new bank account. How does this make sense? Surely I am not the only person that ever opened a new bank account. Why put yourself at risk of not accepting new debit order details vs forcing clients to pay online? and sending through a debit order to a closed account that bounce when clients call you to notify you that the account is closed. DOES NOT MAKE SENSE!