Customer service

I went to checkers menlyn on Friday to buy cokes on special buy 2 get 1 free, I got to the till the guy grated me n said the other free needs to be authorized first.. Ok he called the manager, came this white pregnant trainee manager(Antonaitte) pushed him aside, no greetings to me punched the screen and left. If this person is a trainee mamaner with that behavior then theres a serious problem at menlyn checkers. Can that lady work on the attitude please, if it's pregnancy hormones she must stay home and nurse it. We didn't impregnate her to be treated like that. Am disappointed.