Poor customer service and bad attitude received from a front end supervisor.

I went for shopping at Spar Spargs in Beacon Bay.proceeded to the till points . Upon paying the cashier forgot to activate/apply my rewards. Therefore I was charged R66 instead of R60 but she apologized and asked that I speak to the front end controller for assistance and get a refund. Yhooo what a pathetic service I received from that controller . She was complaining about how tired she is & how inconvenienced she was . How stupid the cashier was for not asking me about the rewards. She did not even take the time to listen cz the cashier did ask she just forgot to take my number for rewards. And you do not shout your cashiers infront of customer that was so unprofessional. How does she expect her cashiers to deliver good customer service if she lacks skills. I hated what she did . She left me there by the tills & proceeded to the kiosk and called me in some "come here lady" with attitude and told me to write my name & telephone no on the till slip. And left me there . I was like is there no refunds book in this store . One word the supervisor that was on front end duty at around 5pm wearing a black and white shirt . She had cornrows on her hair she has no customer service at all.she does not deserve to be controller or supervisor. Take her for customer service training please