Resieving very bad service

Im am a customer at shell 111 stop in villieria nico smit street im buying a lot of blue voucher at the brance on this day 11-03-25 the lady on duty telling me im a *****e because im having a problem with the voucher i bought last night 2 min to 12 having very bad attitude to wards and by telling me to stand out of the shes helping customer and im just there to confuse her and that the matter of me being late for work is non of her consern