Incorrect debi check mandate. ***** case

Debi check mandate once it hits ur account on the app, it does give an option to approve or reject. I have a debit order running on my account which states "telkom" i have queried this with telkom and they have confirmed that the particular account im querying doesn't belong to them. I called Nedbank and was told i can't be assisted and have to let the police handle this. So this means this particular debit order will keep running as i cant be assisted. I asked my account to be flagged and be reported to the ***** department but the agent said that's not their process. My frustration is this is obviously a ***** case yet Nedbank can't assist. I do have an existing account with telkom which shows correct amount being debited. Statements can prove this but Nedbank can't assist