untrained staff

I went to standard bank today In riverside mall rondebosch to enquire why I cannot buy electricity from my bank account,this girl Wendy at enqiuries with a sarcastic smile on her face say its not that hard I must be doing something wrong,i told her I know how to do this and Its not working on my account,i have been trying on my cellphone,internet or ATM,she then said but its not rocket science if you can bye airtime you can bye electricity,i felt belittled and unsatisfied the way this woman handled this matter ,i wont visit that branch in rondebosch again,please look into this matter as standard bank will loose clients like this.