Refused to help,was extremely rude

Me and my dad went to Game to query an Internet payment we made that is not reflecting on our statement we were advised that Kalentina will assist us as soon as the phone is available as the query had to be made with RCS head office when we asked Kalentina why everyone that came after us was assisted and we still standing there she got so upset and raised her voice we were given attitude screamed at when I asked her name she refused to give me her name she made a fool of us in front of everyone screaming and shouting at us as if we were children I have never been so humiliated I will never ever want to do business with anyone that gives that kind of service I expect feedback regarding the matter as well as an apology to me and to my dad as a financial manager I will never expect my company to give that kind of service nor do I expect it from any other service provider I have been in the service industry for years and never have I seen anything like this I need feedback on this or I will escalate this further