Worst ***** experience/support received

My online banking app was hacked recently. It was reported immediately and investigated by Standard bank. The investigation was completed after 6 days as per my email received. It has now been 15 days with no feedback since the completion of the investigation. I have visited my nearest branch, where they pointed me to a desk with a phone as they could not help me. I sat there for almost one hour on hold, then proceeded to leave as I cannot be away from work for more than one hour. I in return, emailed numerous times, called numerous times but to no avail. The only feedback I have received is that the matter has been escalated and that the investigator will call me back. In 8 days it will be one month since this happened. Both my savings account and normal account was cleaned by the hacker and it is clear to me that my bank does not have my best interest at heart seeing as I have not received so much as an ounce of proper feedback. This has never happened to me before, but I sincerely hope that if it does, that I will be with a bank that will be of better assistance and that will provide me with the support that I require.