Taking advantage of retired individuals

I had a *****ulent transaction of R14000 go off my personal bank account, a mere 4 minutes after depositing the cash into the ATM at the bank. (Walmer Park branch). On my way back from the bank, I received a phone call from Nedbank ***** department asking about the *****. I confirmed that this was a *****ulent transaction and needed to be reversed. I do not use Betway and never have. It has been 9 months and I still do not have my funds back. Nedbank are telling me that I authorised the betway payment, however this is not possible. I am a pensioner and not tech savy. How would I have approved this? I have logged a verbal complaint at the bank and will proceed to take the matter to the Banking Ombudsman thereafter if my ****** funds are not returned. I also want copies of call recordings as I get conflicting information from the Nedbank.