I work fast food. I was just taking over front counter from another cashier who was leaving. The drawer hadn’t been changed yet and there were a few customers waiting in line. While my manager was on her way with my drawer, I told the customers, “she’s bringing up my drawer at this moment. You could use the kiosk to order if you like.” They went to order at kiosk immediately

When the manager found out she got mad and sent me home. She said not to send them to kiosk and just take their order. I explained that I didn’t yet have my drawer but she still reiterated that I should never send them to kiosk. I told the GM about the incident and he said I’m not supposed to ever send them to kiosk. But I wasn’t rude or anything. What else could I have done?