Duplicate debit off an account

I travel overseas a bit and on Saturday 8th February 2014 and Sunday 9th February 2014 I withdrew money at different ATMs overseas due to me having a daily withdrew limit.<br> <br> On Monday the 10th February 2014 my statement showed that the two transactions had been duplicated therefore leaving my account with 4 withdrawals instead of 2,I phoned both the banking institutes overseas where I had withdrawn the funds and they confirmed that the funds had not been dispensed twice at both occasion.<br> I emailed and faxed the Disputes Department requesting my funds be returned in to my account on the 10/02/2014 again on the 17/03/2014 and again on the 10/04/2014.<br> In December 2014 I went in to the branch where my account is held ,Menlyn Maine in Pretoria, and I was told it would be refunded which did not happen.<br> On the 10/08/2015 I once again emailed and faxed the Disputes Department and STILL have not had any feedback or response and my money is still just missing.<br> <br> I would like to know how Nedbank managed to balance their books and do their financial Reports when my accounts shows over R10 000 has been taken out my account but the cash was NOT dispensed and WHERE IS MY MONEY AND WHO HAS IT????!!