Unauthorised transfer of funds from my account

On the 22/03/2016 my salary was paid into my account from the preservation fund into which my pension was paid upon my retirement. On the 23rd I discovered that 94% of the funds in my account had transferred (without my authorisation) into an old account that had been paid up in July 2015.On enquiry at the Hayfields branch I was asked to produce **** of payment which I gladly did. The consultant then informed me that the money will transferred back into my account by the 26th which has to date not been done. This money is urgently required to pay my bond, medical aid and groceries for the month. Can anything be done to stop these bulling tactics by this institution?<br> <br> Please can you urgently assist.