Nedbank brieach of trust

App**** for building loan. All costs and BOQ's submitted. 9days before we started building an assessor finally came out and determined that according to their system they now work on 30k a square. We are expected to build to window level and they will then decide if they will finance the project. No problem I cancelled the building loan. Was sent a statement with a due date for payment being June 2026. I responded on the email stating that I will pay the 12k odd end of May to cancell the bond. 1 May 2026 a debit order of R6170 goes off my aco**** without notice and the amount does not reflect any amount on the invoice / statement received. So Nedbank can simply access your bank account and take money from it as they wish?! After emails and calls to every contact I can find a lady phones stating it was part of the settlement to close the bond. How is this possible? I tried to talk to them by cutting off the garages which will in effect cut off 60squares we will not build. They refused support and takes money out of my account without authorisation. Surely this cannot be legal. I have been wiating for an updated statement for over a week - no invoice, no updated statement just 6grand missing in action. No response to date despite more follow up emails and calls.