Bad customer service at gas shop

I've had the worst experience at Brackenfell Gas in old paarl road yesterday. It all started when I didn't see the small paper that says you cannot swipe for under R50. Me and the cashier had a few words after wich he became very unprofessional. I got in my car and the owner stormed at me yelling in to my car (not wearing a facial mask). That is assault in my book. After wich he contacted my employer and soiled my name with all sorts of lies.