Bad Service- Debit Order

I have requested FNB on several occasions to stop the debit order from my account as it is *****. However, I have been going from Piller to post, i have logged a call with the ***** department with no luck. I also tried their banking Ap which is also not user friendly. One of the consultants from the debit order department told me that there is nothing that they can do. Another bank assistant advised me to do the affidavit and upload on the App under debit order dispute however no assistance thus far. This is the reference number of the debit order RESHACKLTNABSA***- They have been debiting the amount of 1,420.00 since October 2022 to date. I also went to Absa to confirm if they know this reference number, but they could not trace it. I have been banking with FNB for more than 10 years and this is the service they provide me with. I was told that there is nothing that they can do.