Inefficient service delivery

On the 28th November, I realized that my bank balance had decreased by R570 however there was no transaction that had occurred to that amount. I called the ***** department numerous times and stayed on the line for over 40min. I had better luck calling the General Enquiries centre and spoke to a consultant named Sinenhlanhla. I relayed the situation to her and after over 20min of what was a useless conversation, she said she needed to assess my bank statements and would get back to me before she leaves work at 19:00. She obviously did not get back to me. I still have R570 missing from my account. The ***** department that is meant to be available 24/7 deemed to be completely useless in a dire situation.