Steeling my money - Unauthorized debit orders

Unauthorized debit orders have been deducted from my bank account for the last year, after placing stop orders and even though I've not been living in South Africa for the last 4 years. I've provided them with an affidavit, al bank accounts and other documents and the only response I get is that it's at the ***** department.

My South African bank account has gone into an overdraft due to this and additionally bank charges is just piling up as I cant close my bank account due to this issue.