My lost school bsg

on th 24 October I was at Pick n pay to make a grocery. I left my school bag at the parcel count the lady that was at the parcel count did not put my bay in the shelf, she put it on the chair.When I came back to take my bag, my bag was not found, when they look to the camera my bag have been given to someone else . I reported it,I talk to Mr Goba the, he said to my I must make the quotation for all the thing were in the bag, they will buy them and they will help me to make my green bar ID which was also in the bag. Today on the 31 October 2015, I went back with the quotation, the some Mr Goba that I speak to him, he told my they can not refund my goods because I was my responsibility.