Rude behaviour towards someone

On June 22, 2024, I was in Clicks Silver Mall to buy some items when I overheard people shouting and screaming at each other. As I got closer to see what was happening, I saw the man in the white pharmacy uniform yelling at a customer, while the customer asked why he was laughing at him (he was a elderly man) when he asked for the pills. The situation escalated, and both of them started swearing at each other. I went to the cashier and asked her to call the supervisor. To my surprise, the man causing the commotion was the supervisor. This happened around 1:30 PM. I don't know the whole story, but I hope the customer filed a complaint to address such behavior from someone who is supposed to be helping customers.