Rude security guard at Pep stores Macassar

On the 25th October 2019, I was at Pep stores Macassar where the security guard followed me and ask at the door to opened my hand bag. I felt the securities have no right to do that. I refuse and she followed me outside and insist to search my bag. I allowed her she even had the nerve to go through my personal stuff. That was my first experience like that at any shop. For that reason I will never go to their shop anymore. I'm aware of that the securities at some shop will check your slip against the items your bought. But that was just rude to me. She did not have any reason to do that, if they want to caught ********* they must check their cameras.