Unprofessional Service in KFC Angelo Mall

Good Day Hello Peter Trust that you are well I would like to formally write a complaint about KFC Angelo Mall as the incident happened on the 4th of April last week Thursday. I wanted to buy a Family meal but instead ended up buying zinger wings due to the poor service & the worst treatment experienced by the Manager that caused the cashier to feel embarrassed as the manager was shouting at the cashier while serving the customers which is not acceptable conduct as it was very unprofessional.