First Car Consultant

I rented a car from First Car for a week, on the Friday 31 January 2020. I returned the car in the Durban branch down town, I left my memory stick in the car and I phoned in on Monday to follow up on the memory stick. I was told that the car was not rented out and is still in their packing. But the memory stick was not known, I am very disappointed because I have been using the First Car service from other branches and if I had left something in the car I always get it the following week as my work requires me to be using a rental car week on week. When I requested Rebecca relook and investigate which I though this was suppose to be standard procedure. I was just brushed away and told that its not found and without no apology and when I mentioned that I was gonna report the matter to Hellopeter cause of the bad service. She responded that I should do what suits me, I am not sure if that is allowed as an ambassador of First Car this was not the response I was expecting. I asked to speak to the manager who addressed me in a polite manner and promised to look into the matter as the car has never left their premises. This was what I was asking from Rebecca to take my matter serious and investigate and get back to me. Cause the memory stick has my work files and personal information that I cannot afford to loose.