No respect of clients/bad service

My sister Banks with Standard Bank so on 28 march 2014, at approximately 17:00, I went to the advanced ATM at Eastgate mall to deposit R1000, since the Branch was already closed by then. The amount was successfully inserted into the ATM, however, an error message returned on a receipt informing me to report to my nearest Branch. i had no choice but to wait for Monday 30/03/2015. I went into the branch the Monday morning at 10am, I spoke to an inquiries staff and presented the error receipt, she asked me to confirm the account number which I attempted to deposit into, did just that. She promised me the error was resolved and it would take at the most a week to reflect in my sister's account. I trusted the service coming for one of the best banks in South Africa. The money, a mere R1000, until today has not appeared and the error still not resolved, apparently the staff added a zero, that what I was told on the 6/04/2015 when I returned to verify the delay, again they promised it was resolved and asked me to give 3 working days. I am now very frustrated, as well as my sister who needed the money to pay a loan which is now in default!!!!! To date still no solution, shame.