Rude unhelpful staff with a terrible attitude

I called into the cellphone banking call centre this morning to query the purchase of Telkom airtime which has deducted from my account but I did not receive the voucher. The lady I spoke was rude and unhelpful. She was raising her voice and spoke with an attitude. She did not know what to do and placed me on hold twice. She eventually was unable to help me and told me to contact Telkom for assistance.