Transaction done on my credit card

I got an SMS today (19 July 2019) that my credit card has been used at Vodafone Sydney (Australia) I called in immediately this morning at 08:00 to the ***** line. I was told that the case has been opened and there is a form that I will need to fill in, I waited the whole day now in the afternoon I call back and I am told the reason why the form was not sent was because there is no need for it anymore. What is a shock to me is the fact that I am told that my case will be goven to an investigator in 48hrs, and the case will take 30 working days to investigate. I really feel that ABSA is not taking my matter as urgent as I am. I mean why would it take 48hrs to hand over my case and why take so long to investigate.

Please explain to me