Disappointed

I was ****** 2 months back now and the ******s used my Bank card. It's been 2 months now that I filled the ***** form,send it through and didn't get any answer back. The teller Darren said I should bring the statement from the police station and,I did it 2 weeks ago now. But, still no answer from the bank. I'm very disappointed regarding Nedbank services. How long does it take to investigate such a case? My sister had a same issue with Absa and it was sorted in a week without going to the Bank even.