Continued debits after details changed

I have been attempting to change my debit order details on record with Teljoy since the start of October 2021.

I have called , completed the debit order form , and called again to confirm the details were changed from my ABSA to my FNB account. This change was confirmed as successful with the next payment to be debited November 2021 on my FNB account.

It is the 3rd of November 2021 and I just received SMS notification at 20:20 from ABSA informing me of a Teljoy debit being unsuccessful as my ABSA account has not been in use for over a month.

I need Teljoy to reconfirm my details have been changed to FNB and to cancel the debit order standing on my ABSA account so I can successfully close it without interrupting my payment arrangement with Teljoy.

I have been enjoying my service and product from Teljoy and even got my unit upgraded without hassles.

Unfortunately I feel as though a debit order change shouldnt cause such anguish. Each time Teljoy debits my old ABSA account it affects my credit record directly and looks like I failed to honour my payment. I have made every effort to rectify my account details yet somehow nothing has changed. Please fix.