Breach of promise to perfom service

I went to Standard Bank in Evaton Mall on the 2nd of February 2015 to reverse a debit order after my cell phone contract supplier debited twice. After standing in a long line to reverse this, the consultant assured me that the debit order would have been reversed by the following day. Today three days later, this still hasn't happened and I have received no explanation whatsoever. I tried calling their branch and still couldn't get through to them. this is one of my many unpleasant encounters with this bank, I think I am going to leave them.