Unprofessional behaviour

Good evening, I'm writing this on Avery heavy heart, I went into a total garage in Midway chiawelo soweto and I asked for MTN R40, and a cashier by the name of Paular responded by saying "what about it"? I think by telli g her that I need airtime for a certain amount she already knws what I want cos the garage sells airtime, I asked her what she meant by "what about it" and she answered, "you heard me or as I not clear? Her customer service was very poor and if that is how she answers people then she shouldn't be serving, personally I would never ever buy at your garage and I will spread the word to my family members and friends, I expect to be treated with dignity and respect in a place that I pay for service