Unauthorised account activity

I made a transfer of R9k on Tuesday night via Internet banking. On Wednesday this hadn't reflected on my account balance and I wondered if I had forgotten to press the 'confirm payment' button. I decided to wait another day and see what happens. At midnight on Wednesday night / Thursday morning I received an sms that the payment had been received, so I thought all was well. But then on Thursday morning I found a FURTHER pending debit of R9k on my account. I phoned the call centre to tell them to block this second transfer as it is unauthorised. After over an hour of to-ing and fro-ing the message was clear: they can't do anything until the money has actually cleared from my account, which will happen overnight. I was advised to phone back tomorrow morning to clear up the matter.<br> This is totally unacceptable because I have not authorised a second payment of R9k from my account and I am now unable to make certain payments today. This appears to be a glitch on Nedbank's side and so they should be able to stop the money from leaving my account if I, as the account holder, request it. Or is it not my money? Waiting until tomorrow is not good enough.